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Annex C ERS SAR.SLC/SLC-I CCT and EXABYTE FORMAT SPECIFICATIONS.

Document No: ER-IS-EPO-GS-5902.3
Issue: 3.0
Date: August 1, 1998
Prepared by: Ola Grabak
Checked by: H.Laur

TABLE OF CONTENTS

1. INTRODUCTION

1.1 General Structure
1.2 Files Description
1.2.1 Volume Directory File
1.2.2 Leader File
1.2.3 Data Set File
1.2.4 Volume Directory File (update of CCT1)
1.2.5 Data Set File
1.2.6 Null Volume File
1.2.7 Notation conventions
1.2.8 File Class
1.2.9 Data Interpretation
1.2.10 Records in products
1.3 Note:

2. VOLUME DIRECTORY FILE FORMAT DEFINITION

3. LEADER FILE FORMAT DEFINITION

4. DATA SET FILE FORMAT DEFINITION

5. NULL VOLUME FORMAT DEFINITION

 

LIST OF TABLES

Table 1 VOLUME DESCRIPTOR RECORD
Table 2 LEADER FILE POINTER RECORD
Table 3 DATA FILE POINTER RECORD
Table 4 TEXT RECORD
Table 5 SAR - LEADER FILE, FILE DESCRIPTOR RECORD
Table 6 SLC DATA SET SUMMARY RECORD
Table 7 MAP PROJECTION DATA RECORD
Table 8 SLC PLATFORM POSITION DATA RECORD
Table 9 SLC FACILITY RELATED DATA RECORD [GENERAL TYPE]
Table 10 SLC FACILITY RELATED DATA RECORD PCS TYPE
Table 11 SAR DATA FILE , FILE DESCRIPTOR RECORD (FIXED SEGMENT)
Table 12 IMAGERY OPTIONS FILE, PROCESSED DATA RECORD
Table 13 NULL VOLUME DESCRIPTOR RECORD

 

1. INTRODUCTION

Single Look Complex Digital

Acronym: SAR.SLC

The product SAR.SLC is a single look complex digital image generated from raw SAR data using up-to-date auxiliary parameters. The image, projected on slant range, referred to as ‘quarter scene’ or quadrant corresponds to approximately one half (range) by one half (azimuth) of a full scene image.
The SLC-I is identical to the SLC, but covers a full scene.
The ESA SAR.SLC format is based on the general definition of the SAR CEOS format (ref. ER-IS-EPO-GS-5902).

1.1 General Structure

The SLC product spans over two CCTs or one exabyte.
The SLC-I spans over one exabyte.
In the case of CCT, tape one (CCT1) contains the following three files:

Volume Directory File
Leader File
Data Set File

1.2 Files Description

1.2.1 Volume Directory File:

Volume Descriptor Record

360 bytes

Leader File Pointer Record

360 bytes

Data Set File Pointer Record

360 bytes

Text Record

360 bytes

1.2.2 Leader File:

File Descriptor Record

720 bytes

Data Set Summary Record

1886 bytes

Map Projection Record

1620 bytes

Platform Position Data Record

..... bytes

Facility Related Data Record General Type

12288 bytes

Facility Related Data Record PCS Quality Type

12288 bytes

1.2.3 Data Set File:

File Descriptor Record

16012 bytes

Image Data Records

16012 bytes

Tape two (CCT2) contains the following three files:

1.2.4 Volume Directory File (update of CCT1):

Volume descriptor record

360 bytes

Leader file pointer record

360 bytes

Data set file pointer record

360 bytes

Text record

360 bytes

1.2.5 Data Set File:

File descriptor record

10012 bytes

Image data records

10012 bytes

1.2.6 Null Volume File:

Volume Descriptor Record

360 bytes

1.2.7 Notation conventions:

$        - the use of the "$"' (dollar sign) in the documentation denotes a requirement for the blank character (ie. the ASCII pt EBCDIC space character).

(n)        - this expression is used to denote the contents of an integer binary field which will vary depending on the product type or data origin and will have to be supplied by the facility generating the tape.

<.....>       - this expression is used to denote the contents of an alphanumeric field, which will vary depending on the product type or data origin and will have to be supplied by the facility generating the tape.

<$...$>        - this expression is used to denote a blank field.

1.2.8 File Class

 

Class Code

Data Type

     

"8$BIT$ASCII$ONLY$$$$$$$$$$$$"

"ASCO"

ASCII only data

"EBCDIC$ONLY$$$$$$$$$$$$$$$$$"

"EBCO"

EBCDIC only

"BCD$ONLY$$$$$$$$$$$$$$$$$$$$"

"BCDO"

BCD only

"BINARY$ONLY$$$$$$$$$$$$$$$$$"

"BINO"

binary only data

"MIXED$BINARY$AND$ASCII$$$$$$"

"MBAA"

binary & ASCII

"MIXED$BINARY$AND$EBCDIC$$$$$"

"MBAE"

binary & EBCDIC

"MIXED$BINARY$AND$BCD$$$$$$$$"

"MBAB"

binary & BCD

"UNDEFINED,$ETC.$$$$$$$$$$$$$"

"UNDF"

undefined

"COMPLEX$$$$$$$$$$$$$$$$$$$$$"

"COMP"

complex

"REAL$$$$$$$$$$$$$$$$$$$$$$$$"

"REAL"

floating point

1.2.9 Data Interpretation

 

Format

Length

     

"INTEGER*1$$$$$$$$$$$$$$$$$$$"

"I*1$"

1 byte wide

"INTEGER*2$$$$$$$$$$$$$$$$$$$"

"I*2$"

2 byte wide

"INTEGER*4$$$$$$$$$$$$$$$$$$$"

"I*4$"

4 byte wide

- one, two and four byte two's complement integer representation

"SIGNED$INTEGER*1$$$$$$$$$$$$"

"IS1$"

1 byte wide

"SIGNED$INTEGER*2$$$$$$$$$$$$"

"IS2$"

2 byte wide

"SIGNED$INTEGER*4$$$$$$$$$$$$"

"IS4$"

4 byte wide

- one, two and four byte signed integer with the most significant bit used to denote sign

"UNSIGNED$INTEGER*1$$$$$$$$$$"

"IU1$"

1 byte wide

"UNSIGNED$INTEGER*2$$$$$$$$$$"

"IU2$"

2 byte wide

"UNSIGNED$INTEGER*4$$$$$$$$$$"

"IU4$"

4 byte wide

- one, two and four byte unsigned integer with the most significant bit used as part of the pixel value, the pixel is always positive.

"REAL*2$$$$$$$$$$$$$$$$$$$$$$"

"R*2$"

2 byte wide

"REAL*4$$$$$$$$$$$$$$$$$$$$$$"

"R*4$"

4 byte wide

"REAL*8$$$$$$$$$$$$$$$$$$$$$$"

"R*8$"

8 byte wide

- two, four and eight byte two's complement floating point representation with the exponent denoted in two's complement binary.(note that the REAL*8 representation is the same as double precision.)

"REAL*2$HEXADECIMAL$$$$$$$$$$"

"R*2H"

2 byte wide

"REAL*4$HEXADECIMAL$$$$$$$$$$"

"R*4H"

4 byte wide

"REAL*8$HEXADECIMAL$$$$$$$$$$"

"R*8H"

8 byte wide

- two, four eight byte hexadecimal floating point representation with the exponent denoted as a hexadecimal exponent. (note that the REAL*8.representation is the same as double precision.)

"COMPLEX*4$$$$$$$$$$$$$$$$$$$"

"C*4$"

4 byte wide

"COMPLEX*8$$$$$$$$$$$$$$$$$$$"

"C*8$"

8 byte wide

- four byte field with the first half (two bytes) containing the two's complement floating point representation value of the real component and the second half containing the imaginary component. Similarly for the eight byte type, with each half of the field containing the real and imaginary pairs.

"COMPLEX$INTEGER*2$$$$$$$$$$$"

"CI*2"

2 byte wide

"COMPLEX$INTEGER*4$$$$$$$$$$$"

"CI*4"

4 byte wide

"COMPLEX$INTEGER*8$$$$$$$$$$$"

"CI*8"

8 byte wide

- similar to the complex floating point representation above except that each component is stored as a two's complement integer.

"COMPLEX$SIGNED$INTEGER*2$$$$"

"CIS2"

2 byte wide

"COMPLEX$SIGNED$INTEGER*4$$$$"

"CIS4"

4 byte wide

"COMPLEX$SIGNED$INTEGER*8$$$$"

"CIS8"

8 byte wide

- similar to the complex floating point representation above except that each component is stored as a signed integer.

"COMPLEX*4$HEXADECIMAL$$$$$$$"

"C*4H"

4 byte wide

"COMPLEX*8$HEXADECIMAL$$$$$$$"

"C*8H"

8 byte wide

- same as the floating point complex notation above except that the representation follows the hexadecimal conventions.

1.2.10 Records in products

Volume Directory File

 

CEOS Codes

   

VOLUME DESCRIPTOR RECORD

192,192,18,18

FILE POINTER RECORD

219,192,18,18

TEXT RECORD

18,63,18,18

Leader File

FILE DESCRIPTOR RECORD

63,192,18,18

DATA SET SUMMARY RECORD

10,10,31,20

MAP PROJECTION DATA RECORD

10,20,31,20

PLATFORM POSITION DATA RECORD

10,30,31,20

FACILITY RELATED DATA RECORD GENERAL TYPE

10,200,31,50

FACILITY RELATED DATA RECORD PCS QUALITY TYPE

10,200,31,50

SAR Data File

FILE DESCRIPTOR RECORD

63,192,18,18

PROCESSED DATA RECORD

50,11,31,20

Null Volume

NULL VOLUME DESCRIPTOR RECORD

192,192,63,18

 

1.3 Note:

Fields not provided are treated as follows:( for a case of a field 8 bytes long)

Field type

Format

Filler

     

alphanumeric

A8

8 blanks

numeric integer

Iw

-9999999

numeric floating point

F8.2

-9999.99

numeric exponential

E8.2

-9999.99E-99

 

WARNING: Please be aware that the field "Example with SLC product" in the following tables, contains only an EXAMPLE of what can be found in a product.

Be aware that for products produced at I-PAF with the ESAR processor, the annotation might differ for some fields. All products produced with the VMP processor since January 1997 should be according to this document.

 

2. VOLUME DIRECTORY FILE FORMAT DEFINITION

Table 1: VOLUME DESCRIPTOR RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

 

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

1

 

2

5-5

B1

1st record sub-type code

192

 

3

6-6

B1

Record type code

192

 

4

7-7

B1

2-nd record sub-type code

18

 

5

8-8

B1

3-rd record sub-type code

18

 

6

9-12

B4

Length of this record

360

 

7

13-14

A2

ASCII/EBCDIC Flag

A

 

8

15-16

A2

Blanks

   

9

17-28

A12

Format control document

CCB-CCT-0002

 

10

29-30

A2

Superstructure format control document

E

 

11

31-32

A2

Superstructure record format revision

A

 

12

33-44

A12

Logical volume generating facility software release and revision level

ERS2-SLC-6.2

 

13

45-60

A16

ID of physical volume containing this volume descriptor

1

 

14

61-76

A16

Logical volume identifier

0005231100005069

 

15

77-92

A16

Volume set identifier

199508 41035 838

 

16

93-94

I2

Total number of physical volumes in the logical volume

1

 

17

95-96

I2

Physical volume sequence number of the first tape within the logical volume

1

 

18

97-98

I2

Physical volume sequence number of the last tape within the logical volume

1

 

19

99-100

I2

Physical volume sequence number of current tape within the logical volume

1

 

20

101-104

I4

First referenced file number in this physical volume within the logical volume

1

 

21

105-108

I4

Logical volume number within volume set

1

 

22

109-112

I4

Logical volume number within physical volume

1

 

23

113-120

A8

Logical volume creation date (YYYYMMDD)

19980505

 

24

121-128

A8

Logical volume creation time (HHMMSSDD, DD=deci-seconds) (DD not provided)

08383523

 

25

129-140

A12

Logical volume generation country(GERMANY, ENGLAND, ITALY)

GERMANY

 

26

141-148

A8

Logical volume generating agency

ESA

 

27

149-160

A12

Logical volume generating facility(D-PAF,UK-PAF, IPAF(ASI), ES, ,MS, KS, FS)

D-PAF

 

28

161-164

I4

Number of pointer records in volume directory

2

 

29

165-168

I4

Number of records in volume directory

4

 

30

169-172

I4

Total number of logical volumes in the set

1

 

31

173-260

A88

Volume descriptor spare segment (Not provided) (always blanks filled)

   

32

261-360

A100

Local use segment (Not provided)

   

 

Table 2: LEADER FILE POINTER RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

2

 

2

5-5

B1

1st record sub-type code

219

 

3

6-6

B1

Record type code

192

 

4

7-7

B1

2nd record sub-type code

18

 

5

8-8

B1

3rd record sub-type code

18

 

6

9-12

B4

Length of this record

360

 

7

13-14

A2

ASCII/EBCDIC Flag

A

 

8

15-16

A2

Blanks

   

9

17-20

I4

Referenced file number

1

 

10

21-36

A16

Referenced file name

ERS2.SAR.SLCLEAD

 

11

37-64

A28

Referenced file class

SAR LEADER FILE

 

12

65-68

A4

Referenced file class code

SARL

 

13

69-96

A28

Referenced file data type

MIXED BINARY AND ASCII

 

14

97-100

A4

Referenced file data type code

MBAA

 

15

101-108

I8

Number of records in referenced file

6

 

16

109-116

I8

Referenced file - 1st record length

720

 

17

117-124

I8

Referenced file maximum record length

12288

 

18

125-136

A12

Referenced file record length type

VARIABLE LEN

 

19

137-140

A4

Referenced file record length type code

VARE

 

20

141-142

I2

Referenced file physical volume start number

1

 

21

143-144

I2

Referenced file physical volume end number

1

 

22

145-152

I8

Referenced file portion start, 1st record number for this physical volume

1

 

23

153-160

I8

Referenced file portion end, last record number for this physical volume

6

 

24

161-260

A100

File pointer spare segment (Not provided)

   

25

261-360

A100

Local use segment (Not provided)

   

 

Table 3: DATA FILE POINTER RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record number

3

 

2

5

Bl

1-st record subtype code

219

 

3

6

Bl

Record type code

192

 

4

7

Bl

2-nd subtype code

18

 

5

8

B1

3-rd subtype code

18

 

6

9-12

B4

Length of this record

360

 

7

13-14

A2

ASCII/EBCDIC flag for referenced file

A

 

8

15-16

A2

Blank

   

9

17-20

I4

Referenced file number

2

 

10

21-36

A16

Referenced file name

ERS2.SAR.SLCIMGY

 

11

37-64

A28

Referenced file class

IMAGERY OPTIONS FILE

 

12

65-68

A4

Referenced file class code

IMOP

 

13

69-96

A28

Referenced file data type

MIXED BINARY AND ASCII

 

14

97-100

A4

Referenced file data type code

MBAA

 

15

101-108

I8

Number of records in referenced file (Depending on product type)

14214

 

16

109-116

I8

Referenced file 1-st record length (Depending on product type)

10012

 

17

117-124

I8

Referenced file maximum record length (Depending on product type)

10012

 

18

125-136

A12

Referenced file record length type

FIXED LENGTH

 

19

137-140

A4

Referenced file record length type code

FIXD

 

20

141-142

I2

Referenced file physical volume start number

1

 

21

143-144

I2

Referenced file physical volume end number

1

 

22

145-152

I8

Referenced file portion start, 1-st record number for this physical volume

1

 

23

153-160

I8

Referenced file portion end, last record number for this physical volume (Depending on product type)

14214

 

24

161-260

Al00

File pointer spare segment (Not provided)

   

25

261-360

Al00

Local use segment

SLC

 

 

Table 4: TEXT RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

4

 

2

5-5

B1

1st record sub-type code

18

 

3

6-6

B1

Record type code

63

 

4

7-7

B1

2nd record sub-type code

18

 

5

8-8

B1

3rd record sub-type code

18

 

6

9-12

B4

Length of this record

360

 

7

13-14

A2

ASCII/EBCDIC Flag

A

 

8

15-16

A2

Continuation flag (*)

   

9

17-56

A40

Product type specifier (ipaf and vmp products differ)

PRODUCT:ERS-2.SAR.SLC

 

10

57-116

A60

Location and date/time of product creation (ipaf and vmp products differ)

GENERATED AT

D-PAF 5-MAY-1998 08:08:19.760

 

11

117-156

A40

Physical volume identification (ipaf and vmp products differ)

Tape 1/1 VOL-ID 1

 

12

157-196

A40

Scene identification (ipaf and vmp products differ)

ORBIT 1508 DATE 04-AUG-1995 08:56:28

 

13

197-236

A40

Scene location

FRAME 2547 LAT: 52.31 LON: 5.07

 

14

237-256

A20

Spares

   

15

257-360

A104

Spares

   

(*) this field is set to "C$" if information is continued on the next text record (if any).

 

3. LEADER FILE FORMAT DEFINITION

Table 5: SAR - LEADER FILE, FILE DESCRIPTOR RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record Sequence Number

1

 

2

5

B1

1st record sub-type code

63

 

3

6

B1

Record type code

192

 

4

7

B1

2nd record sub-type code

18

 

5

8

B1

3rd record sub-type code

18

 

6

9-12

B4

Length of this record

720

 

7

13-14

A2

ASCII/EBCDIC Flag

A

 

8

15-16

A2

Blanks

   

9

17-28

A12

Format control document ID for this data file format

CEOS-SAR-CCT

 

10

29-30

A2

Format control document revision level

B

 

11

31-32

A2

File design descriptor revision letter

B

 

12

33-44

A12

Generating software release and revision level

ERS2-SLC-6.2

 

13

45-48

I4

File number

1

 

14

49-64

A16

File name

ERS2.SAR.SLCLEAD

 

15

65-68

A4

Record sequence and location type flag

FSEQ

 

16

69-76

I8

Sequence number location

1

 

17

77-80

I4

Sequence number field length

4

 

18

81-84

A4

Record code and location type flag

FTYP

 

19

85-92

I8

Record code location

5

 

20

93-96

I4

Record code field length

4

 

21

97-100

A4

Record length and location type flag

FLGT

 

22

101-108

I8

Record length location

9

 

23

109-112

I4

Record length field length

4

 

24-27

113-116

A1

Reserved

   

28

117-180

A64

Reserved segment

   

29

181-186

I6

Number of data set summary records

1

 

30

187-192

I6

Data set summary record length

1886

 

31

193-198

I6

Number of map projection data records

1

 

32

199-204

I6

Map projection record length

1620

 

33

205-210

I6

Number of platform pos. data records

1

 

34

211-216

I6

Platform position record length

1046

 

35

217-222

I6

Number of attitude data records

0

 

36

223-228

I6

Attitude data record length

0

 

37

229-234

I6

Number of radiometric data records

0

 

38

235-240

I6

Radiometric record length

0

 

39

241-246

I6

Number of rad. compensation records

0

 

40

247-252

I6

Radiometric compensation rec. length

0

 

41

253-258

I6

Number of data quality summary records

0

 

42

259-264

I6

Data quality summary record length

0

 

43

265-270

I6

Number of data histograms records

0

 

44

271-276

I6

Data histogram record length

0

 

45

277-282

I6

Number of range spectra records

0

 

46

283-288

I6

Range spectra record length

0

 

47

289-294

I6

Number of DEM descriptor records

0

 

48

295-300

I6

DEM descriptor record length

0

 

49

301-306

I6

Number of radar par. update records

0

 

50

307-312

I6

Radar par. update record length

0

 

51

313-318

I6

Number of annotation data records

0

 

52

319-324

I6

Annotation data record length

0

 

53

325-330

I6

Number of det.processing records

0

 

54

331-336

I6

Det.processing record length

0

 

55

337-342

I6

Number of calibration records

0

 

56

343-348

I6

Calibration record length

0

 

57

349-354

I6

Number of GCP records

0

 

58

355-360

I6

GCP record length

0

 

59-68

361-420

I6

Spare

   

69

421-426

I6

Number of facility data records

2

 

70

427-432

I6

Facility data record maximum length

12288

 

71

433-720

A2

Blanks(288)

   

 :

Table 6: SLC DATA SET SUMMARY RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1 - 4

B4

Record sequence number

2

 

2

5

B1

1-st record sub-type code

10

 

3

6

B1

Record-type code

10

 

4

7

B1

2 nd record sub-type code

31

 

5

8

B1

3 rd record sub-type code

20

 

6

9-12

B4

Length of this record

1886

 

7

13-16

I4

Data Set Summary Record sequence number (starts at 1)

1

 
SCENE PARAMETERS

8

17-20

I4

SAR channel indicator

1

 

9

21-36

A16

Reserved

   

10

37-68

A32

Scene reference number (e.g. orbit - frame number)

ORBIT=01508 - FRAME=2547

 

11

69-100

A32

Scene centre time (UTC)

<YYYYMMDDhhmmssttt> [left justified]

19950804103513060

 

12

101-116

A16

Spare

   

13

117-132

F16.7

Processed scene centre geodetic latitude

(positive for North latitude, negative for South latitude)

52.311

degrees

14

133-148

F16.7

Processed scene centre longitude (negative for West longitude)

5.069

degrees

15

149-164

F16.7

Processed scene centre true heading

192.9872125

degrees

16

165-180

A16

Ellipsoid designator

GEM6

 

17

181-196

F16.7

Ellipsoid semimajor axis

6378.144

km

18

197-212

F16.7

Ellipsoid semiminor axis

6356.759

km

19

213-228

F16.7

Earth mass times gravitational constant (M . G)

3.9860044

kg.m/s2

20

229-244

A16

Spare

   

21

245-260

F16.7

Ellipsoid J2 parameter

1082.28

 

22

261-276

F16.7

Ellipsoid J3 parameter

-2.30

 

23

277-292

F16.7

Ellipsoid J4 parameter

-0.20

 

24

293-308

A16

Spare

   

25

309-324

F16.7

Reserved

   

26

325-332

I8

Scene centre line number (Depending on product type)

(the line number at the scene centre including zero fill)

7106

 

27

333-340

I8

Scene centre pixel number (Depending on product type)

(the pixel number at the scene centre including zero fill)

1250

 

28

341-356

F16.7

Processed scene length including zero fill

56.3971840

km

29

357-372

F16.7

Processed scene width including zero fill

19.7600000

km

30

373-388

A16

Spare

   
GENERAL MISSION / SENSOR PARAMETERS

31

389-392

I4

Number of SAR channels

1

 

32

393-396

A4

Spare

   

33

397-412

A16

Sensor platform mission identifier

ERS2

 

34

413-444

A32

Sensor ID and mode of operation for this channel

<AAAAAA-BB-CC-DD-EF> where :

AAAAAA = sensor identifier; BB = SAR band;

CC = resolution mode code; DD = imaging mode code;

E = transmit polarisation; F = receiver polarisation

SAR- C-HR-IM-VV

 

35

445-452

A8

Orbit number

1508

 

36

453-460

F8.3

Sensor platform geodetic latitude at nadir corresponding to scene centre (positive for North latitude)

51.455

degrees

37

461-468

F8.3

Sensor platform longitude at nadir corresponding to scene centre

(negative for West longitude)

-9.626

degrees

38

469-476

F8.3

Sensor platform heading at nadir corresponding to scene centre

(clockwise positive from North)

196.188

degrees

39

477-484

F8.3

Sensor clock angle as measured relative to sensor platform flight direction

90

degrees

40

485-492

F8.3

Incidence angle at scene centre as derived from sensor platform orientation

24.889

degrees

41

493-500

F8.3

Radar frequency

5.300

GHz

42

501-516

F16.7

Radar wavelength

0.056666

meters

43

517-518

A2

Motion compensation indicator

"00" = no compensation, "01" = on board compensation, "10" = in processor compensation, "11" = both on board and in processor

00

 

44

519-534

A16

Range pulse code specifier

LINEAR FM CHIRP

 

45

535-550

E16.7

Nominal range pulse (chirp) amplitude coefficient, Constant term

1.0E+00

 

46

551-566

E16.7

Nominal range pulse (chirp) amplitude coefficient, Linear term

0.0E+00

sec-1

47

567-582

E16.7

Nominal range pulse (chirp) amplitude coefficient, Quadratic term

0.0E+00

sec-2

48

583-598

E16.7

Nominal range pulse (chirp) amplitude coefficient, Cubic term

0.0E+00

sec-3

49

599-614

E16.7

Nominal range pulse (chirp) amplitude coefficient, Quartic term

0.0E+00

sec-4

50

615-630

E16.7

Nominal range pulse (chirp) phase coefficient, Constant term

0.0E+00

cycles

51

631-646

E16.7

Nominal range pulse (chirp) phase coefficient, Linear term

0.0E+00

Hz

52

647-662

E16.7

Nominal range pulse (chirp) phase coefficient, Quadratic term

2.0889E+11

Hz/sec

53

663-678

E16.7

Nominal range pulse (chirp) phase coefficient, Cubic term

0.0E+00

Hz/sec2

54

679-694

E16.7

Nominal range pulse (chirp) phase coefficient, Quartic term

0.0E+00

Hz/sec3

55

695-702

I8

Down linked chirp extraction index

29

samples

56

703-710

A8

Spare

   

57

711-726

F16.7

Range sampling rate

18.96

MHz

58

727-742

F16.7

Range gate delay at early edge (in time) at the start of the image (Not provided)

-9999999.9999999

microsec

59

743-758

F16.7

Range pulse length

37.12

microsec

60

759-762

A4

Reserved

   

61

763-766

A4

Range compressed flag (YES = range compressed data)

YES

 

62-63

767-798

2 F16.7

Reserved

   

64

799-806

I8

Quantization per channel I & Q (5I 5Q/6I 6Q for OGRC/OBRC)

5

bits

65

807-818

A12

Quantizer descriptor

UNIFORM I Q

 

66

819-834

F16.7

DC Bias for I-component (actual value)

-0.003

 

67

835-850

F16.7

DC Bias for Q-component (actual value)

0.029

 

68

851-866

F16.7

Gain imbalance for I & Q (actual value)

0.996

 

69-70

867-898

F16.7

Spare

   

71

899-914

F16.7

Reserved

   

72

915-930

F16.7

Antenna mechanical boresight angle relative to platform vertical axis

20.355

degrees

73

931-934

A4

Reserved

   

74

935-950

F16.7

Pulse Repetition Frequency (PRF) (actual value)

1679.902

Hz

75-76

951-982

F16.7

Reserved

   
SENSOR SPECIFIC PARAMETERS

77

983-998

I16

Satellite encoded binary time code

2337315430

 

78

999-1030

A32

Satellite clock time (UTC) <YYYYMMDDhhmmssttt> [left justified]

19950804102258542

 

79

1031-1038

I8

Satellite clock step length

3906249

nanosec

80

1039-1046

A8

Spare

   
GENERAL PROCESSING PARAMETERS

81

1047-1062

A16

Processing facility identifier (MS, KS, FS, ES, D-PAF, IP and UK-PAF)

D-PAF

 

82

1063-1070

A8

Processing system identifier (VMP for D-PAF, UK-PAF and ES)

VMP

 

83

1071-1078

A8

Processing version identifier

6.2

 

84-85

1079-1110

A16

Reserved

   

86

1111-1142

A32

Product type specifier

SAR SINGLE LOOK COMPLEX IMAGE

 

87

1143-1174

A32

Processing algorithm identifier

RANGE DOPPLER

 

88

1175-1190

F16.7

Nominal number of looks processed in azimuth

1

looks

89

1191-1206

F16.7

Nominal number of looks processed in range

1

looks

90

1207-1222

F16.7

Bandwidth per look in azimuth (null-to-null)

1378.00

Hz

91

1223-1238

F16.7

Bandwidth per look in range

15.55

MHz

92

1239-1254

F16.7

Total processor bandwidth in azimuth

1378.00

Hz

93

1255-1270

F16.7

Total processor bandwidth in range

15.55

MHz

94

1271-1302

A32

Weighting function designator in azimuth

HAMMING

 

95

1303-1334

A32

Weighting function designator in range

HAMMING

 

96

1335-1350

A16

Data input source

HDDT

 

97

1351-1366

F16.7

Nominal resolution in range (3-dB width)

10

m

98

1367-1382

F16.7

Nominal resolution in azimuth (3-dB width)

5

m

99-100

1383-1414

F16.7

Reserved

   

101

1415-1430

F16.7

Along track Doppler frequency centroid at early edge of image, Constant term (Not provided by the VMP)

-9999999.9999999

Hz

102

1431-1446

F16.7

Along track Doppler frequency centroid at early edge of image, Linear term (Not provided by the VMP)

-9999999.9999999

Hz/sec

103

1447-1462

F16.7

Along track Doppler frequency centroid at early edge of image, Quadratic term (Not provided by the VMP)

-9999999.9999999

Hz/sec/sec

104

1463-1478

A16

Spare

   

105

1479-1494

F16.7

Cross track Doppler frequency centroid at early edge of image, Constant term

(Doppler centroid)

-227.608

Hz

106

1495-1510

F16.7

Cross track Doppler frequency centroid at early edge of image, Linear term

(Slope of Doppler centroid)

-1859032.000

Hz/sec

107

1511-1526

F16.7

Cross track Doppler frequency centroid at early edge of image, Quadratic term

8896000000.000

Hz/sec/sec

108

1527-1534

A8

Time direction indicator along pixel direction

INCREASE

 

109

1535-1542

A8

Time direction indicator along line direction

INCREASE

 

110

1543-1558

F16.7

Along track Doppler frequency rate at early edge of image, Constant term (Not provided by the VMP)

-9999999.9999999

Hz/sec

111

1559-1574

F16.7

Along track Doppler frequency rate at early edge of image, Linear term (Not provided by the VMP)

-9999999.9999999

Hz/sec/sec

112

1575-1590

F16.7

Along track Doppler frequency rate at early edge of image, Quadratic term (Not provided by the VMP)

-9999999.9999999

Hz/sec/sec/sec

113

1591-1606

A16

Spare

   

114

1607-1622

F16.7

Cross track Doppler frequency rate at early edge of image, Constant term

(Azimuth FM rate)

-2087.049

Hz/sec

115

1623-1638

F16.7

Cross track Doppler frequency rate at early edge of image, Linear term

(Slope of Azimuth FM rate)

376610.182

Hz/sec/sec

116

1639-1654

F16.7

Cross track Doppler frequency rate at early edge of image, Quadratic term (Not provided by the VMP)

-9999999.9999999

Hz/sec/sec/sec

117

1655-1670

A16

Spare

   

118

1671-1678

A8

Line content indicator

RANGE

 

119

1679-1682

A4

Clutterlock applied flag

NOT

 

120

1683-1686

A4

Autofocussing applied flag

NOT

 

121

1687-1702

F16.7

Line spacing

3.968

m

122

1703-1718

F16.7

Pixel spacing (in range)

7.904

m

123

1719-1734

A16

Processor range compression designator

EXTRACTED CHIRP

 

124-125

1735-1766

A16

Spare

   
SENSOR SPECIFIC LOCAL USE SEGMENT

126/1

1767-1782

F16.7

Zero-doppler range time (two-way) of first range pixel

5.6915950

millisec

126/2

1783-1798

F16.7

Zero-doppler range time (two-way) of centre range pixel

5.7572510

millisec

126/3

1799-1814

F16.7

Zero-doppler range time (two-way) of last range pixel

5.8230120

millisec

126/4

1815-1838

A24

Zero-doppler azimuth time of first azimuth pixel (UTC)

<dd-MMM-yyyy$hh:mm:ss.ttt>

04-AUG-1995

10:35:08.830

 

126/5

1839-1862

A24

Zero-doppler azimuth time of centre azimuth pixel (UTC)

<dd-MMM-yyyy$hh:mm:ss.ttt>

04-AUG-1995

10:35:13.060

 

126/6

1863-1886

A24

Zero-doppler azimuth time of last azimuth pixel (UTC)

<dd-MMM-yyyy$hh:mm:ss.ttt>

04-AUG-1995

10:35:17.290

 

 

Table 7: MAP PROJECTION DATA RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1 - 4

B4

Record sequence number

3

 

2

5

B1

1-st record sub-type code

10

 

3

6

B1

Record-type code

20

 

4

7

B1

2 nd record sub-type code

31

 

5

8

B1

3 rd record sub-type code

20

 

6

9-12

B4

Length of this record

1620

 

7

13-28

A16

Spare

   
MAP PROJECTION GENERAL INFORMATION

8

29-60

A32

Map projection descriptor

Slant range

 

9

61-76

I16

Number of pixels per line of image (Depending on product type)

2500

pixels

10

77-92

I16

Number of lines (Depending on product type)

14213

lines

11

93-108

F16.7

Nominal inter-pixel distance in output scene

7.904

m

12

109-124

F16.7

Nominal inter-line distance in output scene

3.968

m

13

125-140

F16.7

Orientation at output scene centre [for geocoded products this is simply the convergence of the meridians, ie: the angle between geographic north and map grid north (Angle of projection axis from true North)]

192.9872125

degrees

14

141-156

F16.7

Nominal platform orbital inclination (168days=98.491, 35days=98.516, 3days=98.542)

98.542

degrees

15

157-172

F16.7

Actual ascending node (longitude at Equator) (Not provided by the VMP)

-9999999.9999999

degrees

16

173-188

F16.7

Geocentre to platform distance at input scene centre (Not provided)

-9999999.9999999

 

17

189-204

F16.7

Platform geodetic altitude over the ellipsoid (Not provided)

-9999999.9999999

 

18

205-220

F16.7

Ground speed at nadir at input scene centre time (Not provided)

-9999999.9999999

 

19

221-236

F16.7

Platform heading at nadir corresponding to scene centre

196.188

degrees

20

237-268

A32

Name of reference ellipsoid

GEM6

 

21

269-284

F16.7

Semimajor axis of ref.ellipsoid

6378.144

km

22

285-300

F16.7

Semiminor axis of ref.ellipsoid

6356.759

km

23 to 55

301-880

A580

Reserved

   

56 to 59

881-944

4 A16

Spares

   
COORDINATES OF FOUR CORNER POINTS

60 to 67

945-1072

A128

Reserved

   

68

1073-1088

F16.7

1st line 1st pixel geodetic latitude (positive for North latitude)

52.510

degrees

69

1089-1104

F16.7

1st line 1st pixel longitude (negative for West longitude)

5.508

degrees

70

1105-1120

F16.7

1st line last pixel geodetic latitude

52.603

degrees

71

1121-1136

F16.7

1st line last pixel longitude

4.834

degrees

72

1137-1152

F16.7

Last line last pixel geodetic latitude

52.108

degrees

73

1153-1168

F16.7

Last line last pixel longitude

4.654

degrees

74

1169-1184

F16.7

Last line 1st pixel geodetic latitude

52.016

degrees

75

1185-1200

F16.7

Last line 1st pixel longitude

5.320

degrees

76 to 96

1201-1620

A420

Reserved & spares

   

 

Table 8: SLC PLATFORM POSITION DATA RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1 - 4

B4

Record sequence number

4

 

2

5

B1

1-st record sub-type code

10

 

3

6

B1

Record-type code

30

 

4

7

B1

2 nd record sub-type code

31

 

5

8

B1

3 rd record sub-type code

20

 

6

9-12

B4

Length of this record (not fixed length)

1046

 

7

13-44

A32

Reserved

   

8 to 13

45-140

6 F16.7

Reserved

   
POSITIONAL DATA POINTS

14

141-144

I4

Number of data points ( always equal to 5 for the VMP)

5

 

15

145-148

I4

Year of data point <YYYY>

1995

 

16

149-152

I4

Month of data point <$$MM>

8

 

17

153-156

I4

Day of data point <$$DD>

4

 

18

157-160

I4

Day in the year <GMT> (1st January = Day 1)

0216

 

19

161-182

D22.15

Seconds of day of data

4.345874400E+04

sec

20

183-204

D22.15

Time interval between data points

2.345000000E+00

sec

21

205-268

A64

Reference coordinate system

Earth Fixed Reference System

 

22

269-290

D22.15

Greenwich mean hour angle (Not provided by the VMP)

-9.99…E+03

degrees

23

291-306

F16.7

Along track position error (Not provided by the VMP)

-9999999.9999999

meters

24

307-322

F16.7

Across track position error (Not provided by the VMP)

-9999999.9999999

meters

25

323-338

F16.7

Radial position error (Not provided by the VMP)

-9999999.9999999

meters

26-28

339-386

F16.7

Reserved

   
FIRST POSITIONAL DATA POINT

29

387-408

D22.15

1st data point - Position vector X

4.4599626E+06

m

 

409-430

D22.15

1st data point - Position vector Y

1.093685E+05

m

 

431-452

D22.15

1st data point - Position vector Z

5.59626963E+06

m

30

453-474

D22.15

1st data point - Velocity vector X'

-5.61894961E+03

m/s

 

475-496

D22.15

1st data point - Velocity vector Y'

-2.2451222E+03

m/s

 

497-518

D22.15

1st data point - Velocity vector Z'

4.5109856E+03

m/s

SECOND POSITIONAL DATA POINT

31

519-540

D22.15

2nd data point - Position vector X

4.43734455E+06

m

 

541-562

D22.15

2nd data point - Position vector Y

1.0035342E+05

m

 

563-584

D22.15

2nd data point - Position vector Z

5.61434529E+06

m

32

585-606

D22.15

2nd data point - Velocity vector X'

-5.639553E+03

m/s

 

607-628

D22.15

2nd data point - Velocity vector Y'

-2.24227818E+03

m/s

 

629-650

D22.15

2nd data point - Velocity vector Z'

4.48649896E+03

m/s

33-

EOR

 

Blanks

   
Repetition of fields 29-30 as specified by the number of points in field 14 (usually 5 or 6 data points)

 

Table 9: SLC FACILITY RELATED DATA RECORD [GENERAL TYPE]

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1 - 4

B4

Record sequence number

5

 

2

5

B1

1-st record sub-type code

10

 

3

6

B1

Record-type code

200

 

4

7

B1

2 nd record sub-type code

31

 

5

8

B1

3 rd record sub-type code

50

 

6

9-12

B4

Length of this record

12288

 

7

13-76

A64

Name of this facility related data record

FACILITY RELATED DATA RECORD [ESA GENERAL TYPE]

 
SIGNAL DATA QUALITY

8

77-82

A6

Date of last release of QC software <YYMMDD> (Not provided by the VMP)

   

9

83-84

A2

Spare

   

10

85-90

A6

Date of the last calibration update <YYMMDD>

950713

 

11

91-94

I4

Overall QA summary flag (Sum of the next 9 following flags)

0000

 

12

95-98

I4

PRF code change flag (0 = PRF constant in scene)

0

 

13

99-102

I4

Sampling window start time change flag (0 = SWST constant)

0

 

14

103-106

I4

Cal. system & receiver gain change flag (0 = Cal/Rx gain constant)

0

 

15

107-110

I4

Chirp replica quality flag (0 = Replica XCF in limits)

0

 

16

111-114

I4

Input data statistics flag (0 = Raw data mean & sd in limits)

0

 

17

115-118

I4

Doppler centroid confidence measure flag (0 = in limits)

0

 

18

119-122

I4

Doppler centroid value (0 = Dopp-centroid less than PRF/2)

0

 

19

123-126

I4

Doppler ambiguity confidence measure flag (0 = in limits)

0

 

20

127-130

I4

Output data mean flag (0 = Image mean or sd in limits)

0

 

21

131-134

I4

On ground / on board range compressed flag (0 = OGRC)

0

 

22

135-138

I4

Number of PRF code changes

0

 

23

139-142

I4

Number of sampling window time changes

0

 

24

143-146

I4

Number of calibration subsystems gain changes

0

 

25

147-150

I4

Number of missing lines (i.e. raw data input lines)

1

 

26

151-154

I4

Number of receiver gain changes

0

 

27

155-170

F16.7

3-dB pulse width of (first) Chirp Replica Cross Correlation Function (CCF)

1.139

samples

28

171-186

F16.7

First side lobe level of chirp CCF

-9.304

dB

29

187-202

F16.7

ISLR of chirp CCF function

-6.595

dB

30

203-218

F16.7

Doppler centroid confidence measure

(value normalized such that it takes a value of zero for the best case and a value of one for the worst case)

0.024

 

31

219-234

F16.7

Doppler ambiguity confidence measure

(value normalized such that it takes a value of one for the best case and a value of zero for the worst case)

1.000

 

32

235-250

F16.7

Estimated mean of I input data (once the nominal bias of 15.5 has been applied)

-0.003

 

33

251-266

F16.7

Estimated mean of Q input data (once the nominal bias of 15.5 has been applied)

0.029

 

34

267-282

F16.7

Estimated standard deviation of I input data

3.728

 

35

283-298

F16.7

Estimated standard deviation of Q input data

3.740

 

36

299-314

F16.7

Calibration system gain of first processed line (telemetry value)

7

 

37

315-330

F16.7

Receiver gain of first processed line (telemetry value)

19

 

38

331-346

F16.7

Doppler ambiguity number

0

 

39

347-362

A16

Spare

   
CALIBRATION INFORMATION

40

363-378

F16.7

Bias correction applied to I channel (to be added to the nominal bias)

0.003

 

41

379-394

F16.7

Bias correction applied to Q channel (to be added to the nominal bias)

-0.029

 

42

395-410

F16.7

I/Q gain imbalance correction (applied to I channel)

1.000

 

43

411-426

F16.7

I/Q gain imbalance correction (applied to Q channel)

0.996

 

44

427-442

F16.7

I/Q non-orthogonality correction (applied to Q channel)

0.333

 

45

443-458

A16

Spare

   

46

459-474

F16.7

Estimated noise power per sample (Not provided by the VMP)

-9999999.9999999

 

47

475-490

I16

Calibration pulse time delay (Not provided by the VMP)

-9999999.9999999

nanosec

48

491-494

I4

Number of valid calibration pulses ( 0 for the VMP)

0

pulses

49

495-498

I4

Number of valid noise pulses (0 for the VMP)

0

pulses

50

499-502

I4

Number of valid replica pulses

1

pulses

51

503-518

F16.7

First sample in replica (chirp extraction index)

29.000

samples

52

519-534

F16.7

Mean calibration pulse power (Not provided by the VMP)

-9999999.9999999

 

53

535-550

F16.7

Mean noise pulse power (Not provided by the VMP)

-9999999.9999999

 

54

551-566

F16.7

Range compression normalisation factor

12055352.000

 

55

567-582

F16.7

Replica pulse power

154322.000

 

56

583-598

F16.7

Incidence angle at first range pixel (at mid-azimuth)

23.191

degrees

57

599-614

F16.7

Incidence angle at centre range pixel (at mid-azimuth)

24.889

degrees

58

615-630

F16.7

Incidence angle at last range pixel (at mid-azimuth)

26.436

degrees

59

631-646

F16.7

Slant range reference (for range spreading loss compensation) (set to 0 for ERS.SAR.SLC)

0

km

60

647-658

A12

Spare

   

61

659-662

I4

Antenna pattern correction flag (0 = no correction)

0

 

62

663-678

F16.7

Absolute calibration constant K

93325.300

scalar

63

679-694

F16.7

Upper bound calibration constant K (+ 3 std dev)

102329.000

 

64

695-710

F16.7

Lower bound calibration constant K (- 3 std dev)

85113.000

 

65

711-726

F16.7

Estimated noise equivalent s o

-24.0

dB

66

727-732

A6

Date on which K was generated <YYMMDD>

950713

 

67

733-736

A4

K version number as XXYY,

where XX refers to a K update implemented across the ground segment and YY refers to an upgrade only at the source facility (as may arise in case of local software updates)

0100

 
VARIOUS PARAMETERS (from SPH fields)

68

737-740

I4

Number of duplicated input lines (Not provided by the VMP)

-999

 

69

741-756

F16.7

Estimated bit error rate (Not provided by the VMP)

-9999999.9999999

 

70

757-768

A12

Spare

   

71

769-784

F16.7

Output image mean (Not provided)

-9999999.9999999

 

72

785-800

F16.7

Output image standard deviation (Not provided)

-9999999.9999999

 

73

801-816

F16.7

Output image maximum value (Not provided)

-9999999.9999999

 

74

817-840

A24

Time of raw data first input range line (UTC)

<dd-MMM-yyyy$hh:mm:ss.ttt>

4-AUG-1995 10:35: 8.383

 

75

841-864

A24

Time of ascending node state vectors (UTC)

<dd-MMM-yyyy$hh:mm:ss.ttt>

   

76 to 81

865-996

6 D22.15

Ascending node state vectors (X,Y,Z,X',Y',Z')

0.00..e+00

m & m/s

82

997-1000

I4

Output pixel bit length

0032

bits

83

1001-1016

F16.7

Processor gain #1

0.572

 

84

1017-1032

F16.7

Processor gain #2

1.000

 

85

1033-1048

F16.7

Processor gain #3

0.556

 

86

1049-1052

I4

Peak location of Cross Correlation Function (CCF) between first extracted chirp and nominal chirp

0029

samples

87

1053-1068

F16.7

3-dB width of Cross Correlation Function (CCF) between last extracted chirp and nominal chirp

1.138

samples

88

1069-1084

F16.7

First side lobe level of chirp CCF between last extracted chirp and nominal chirp

-9.296

dB

89

1085-1100

F16.7

ISLR of chirp CCF between last extracted chirp and nominal chirp

-6.587

dB

90

1101-1104

I4

Peak location of Cross Correlation Function (CCF) between last extracted chirp and nominal chirp

0029

samples

91

1105-1108

I4

Roll tilt mode flag (0 = not in roll tilt mode)

0

 

92

1109-1112

I4

Raw data correction flag (0 = correction with defaults parameters)

1

 

93

1113-1116

I4

Look detection flag (1 = power detected and summed)

0

 

94

1117-1120

I4

Doppler ambiguity estimation flag (0 = no estimation done)

1

 

95

1121-1124

I4

Azimuth baseband conversion flag (0 = no conversion done)

0

 

96

1125-1128

I4

Samples per line used for the raw data analysis

1000

samples

97

1129-1132

I4

Range lines skip factor for raw data analysis

0010

lines

98

1133-1156

A24

Time of input state vector (UTC) used to processed the image

<dd-MMM-yyyy$hh:mm:ss.ttt>

04-AUG-1995 10:35:00.000

 

99

1157-1178

D22.15

Input state vector - Position vector X

4.33291511E+06

m

100

1179-1200

D22.15

Input state vector - Position vector Y

6.832440E+05

m

101

1201-1222

D22.15

Input state vector - Position vector Z

5.68776213E+06

m

102

1223-1244

D22.15

Input state vector - Velocity vector X'

-5.72938895E+03

m/s

103

1245-1266

D22.15

Input state vector - Velocity vector Y'

-2.23133119E+03

m/s

104

1267-1288

D22.15

Input state vector - Velocity vector Z'

4.38098297E+03

m/s

105

1289-1292

I4

Input state vector type flag

(0 = ascending node state vectors, i.e predicted orbit,

1 = near scene state vectors, i.e. restituted, preliminary or precise orbit)

0001

 

106

1293-1308

F16.7

Window coefficient for range-matched filter

0.75

 

107

1309-1324

F16.7

Window coefficient for azimuth-matched filter

0.75

 

108

1325-1328

I4

Update period of range-matched filter

2000

chirps

109

1329-1456

8 F16.7

Look scalar gains (up to 8 looks)

1,0,0,0,0,0,0,0

 

110

1457-1460

I4

Sampling window start time bias

6265

nanosec

111

1461-1482

E22.15

Doppler centroid cubic coefficient

0.0..00 e+00

Hz/sec3

112

1483-1486

I4

PRF code of first range line (telemetry value)

2820

 

113

1487-1490

I4

PRF code of last range line (telemetry value)

2820

 

114

1491-1494

I4

Sampl. wind. start time code of first range line (telemetry value)

1010

 

115

1495-1498

I4

Sampl. wind. start time code of last range line (telemetry value)

1010

 

116

1499-1502

I4

Calibration system gain of last processed line (telemetry value)

7

 

117

1503-1506

I4

Receiver gain of last processed line (telemetry value)

19

 

118

1507-1510

I4

First processed range sample

2413

 

119

1511-1514

I4

Azimuth FFT/IFFT ratio

1

 

120

1515-1518

I4

Number of azimuth blocks processed

16

 

121

1519-1526

I8

Number of input raw data lines (Depending on product type)

15443

lines

122

1527-1530

I4

Initial Doppler ambiguity number

0

 

123

1531-1578

3F16.7

Chirp quality thresholds

- Pulse width of the chirp CCF

- First sidelobe of the chirp CCF

- ISLR of the chirp CCF

 

1.2

-11.0

-8.0

 

pixels

dB

dB

 

1579-1642

4F16.7

Input data statistic thresholds

- Mean of input I data in fraction of maximum absolute of input data

- Mean of input Q data in fraction of maximum absolute of input data

- Standard deviation of input I data in fraction of maximum absolute of input

data

- Standard deviation of input Q data in fraction of maximum absolute of input

data

 

0.1

0.1

0.2

 

0.2

 
 

1643-1674

2F16.7

Doppler ambiguity confidence thresholds

0.05,0.90

 
 

1675-1706

2F16.7

Output data statistic thresholds

- Mean of outout data

- Standard deviation of output data

 

200

100

 

124

1707-1722

I16

Satellite binary time of first range line (telemetry value) (Not provided by the VMP)

-9999999.9999999

 

125

1723-1726

I4

Number of valid pixels per rang eline (the remaining pixels are zero padded)

2493

pixels

126

1727-1730

I4

Number of range samples discarded during processing interpolations

0007

samples

127

1731-1746

F16.7

I/Q gain imbalance - Lower bound

0.997

 

128

1747-1762

F16.7

I/Q gain imbalance - Upper bound

1.002

 

129

1763-1778

F16.7

I/Q quadrature departure - Lower bound

-1.502

degrees

130

1779-1794

F16.7

I/Q quadrature departure - Upper bound

2.168

degrees

131

1795-1810

F16.7

3-dB look bandwidth

764.600

Hz

132

1811-1826

F16.7

3-dB processed Doppler bandwidth

764.600

Hz

133

1827-1830

I4

Range spreading loss compensation flag (0 = no compensation)

0000

 

134

1831-1832

I1

Datation flag (1 = azimuth timing improved based on timing information of range line specified in field 136)

1

 

135

1833-1838

I7

Maximum error of range line timing

0334613

nanosec

136

1839-1844

I7

Format number of range line used to synchronize the azimuth timing

0563740

 

137

1845-1846

I1

Automatic look scalar gain flag (1= automatically calculated)

0

 

138

1847-1850

I4

Maximum value of look scalar gain before the look scalar gaIns are normalised (Not provided by the VMP)

-999

 

139

1851-1854

I4

Replica normalisation method flag

(0 = normalised by replica power, i.e. Z' = Z . c/Ar where Ar is the replica power and c is specified in field 54,

1 = normalised by the square root of replica power, i.e. Z' = Z / Ar )

0

 

140

1855-1934

4 E20.10

4 coefficients of the ground range to slant range conversion polynomial (not used for SLC and SLC-I)

 

· For the VMP, the coefficients can be used to calculate the range time of the output range sample as follows :

Tn = (C0 + C1.Gn + C2.Gn2 + C3.Gn3) / Fr + T0

where :

Gn is ground range of sample n from first range sample in metres

Fr is the range sampling rate in Hz (field DSS 57)

T0 is the range time of the first output range sample (field DSS 126/1)

 

· For the Bangkok processor, the coefficients can be used to calculate the slant range sample corresponding to the output range sample as follows :

Sn = C0 + C1.Gn + C2.Gn2 + C3.Gn3

where :

Gn is ground range sample number n

Sn is the corresponding slant range sample n

1.469....e-39

1.469....e-39

1.469....e-39

1.469....e-39

 

141

1935-2034

5 E20.10

5 coefficients of the antenna elevation pattern polynomial (not used for SLC and SLC-I)

 

· For the VMP, the coefficients can be used to calculate the antenna elevation pattern as a function of range time as follows :

At = C0 + C1.T + C2.T2 + C3.T3 + C4.T4

where :

At is expressed in Db

T is the range time relative to the polynomial origin in seconds (field 142)

 

· For the Bangkok processor, the coefficients can be used to calculate the antenna elevation pattern as a function of range pixel look angle as follows :

At = C0 + C1.T + C2.T2 + C3.T3 + C4.T4

where :

At is expressed in natural value (not in dB) from 1 to 0

T is the range pixel look angle in degrees

 

This field is not relevant for the VMP version 6.0 and above, for which there is a linear interpolation of the antenna pattern.

-7.1206316E+02

1.4109934E+02

-1.0455099E+01

3.4380848E-01

-4.2333874E-03

 

142

2035-2050

E16.7

Range time of origin of antenna pattern polynomial

This field is not relevant for the VMP version 6.0 and above, for which there is a linear interpolation of the antenna pattern.

5.6292670e+06

sec

143

2051-12288

A10238

Spare

   

 

Table 10: SLC FACILITY RELATED DATA RECORD PCS TYPE

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1 - 4

B4

Record sequence number

7

 

2

5

B1

1-st record sub-type code

10

 

3

6

B1

Record-type code

200

 

4

7

B1

2 nd record sub-type code

31

 

5

8

B1

3 rd record sub-type code

50

 

6

9-12

B4

Length of this record

12288

 

7

13-76

A64

Name of this facility related data record

FACILITY RELATED DATA RECORD [ESA PCS QUALITY TYPE]

 

8

77-12288

B

ESA reserved

   

 

4. DATA SET FILE FORMAT DEFINITION

Table 11: SAR DATA FILE , FILE DESCRIPTOR RECORD (FIXED SEGMENT)

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

1

 

2

5

B1

1st record sub-type code

63

 

3

6

B1

Record sub-type code

192

 

4

7

B1

2nd record sub-type code

18

 

5

8

B1

3rd record sub-type code

18

 

6

9-12

B4

Length of this record (Depending on product type)

10012

 

7

13-14

A2

ASCII/EBCDIC flag

A

 

8

15-16

A2

Blanks

   

9

17-28

A12

Format control document ID for this data file format

CEOS-SAR-CCT

 

10

29-30

A2

Format control document revision level

B

 

11

31-32

A2

File design descriptor revision letter

B

 

12

33-44

A12

Generating software release and revision level

ERS2-SLC-6.2

 

13

45-48

I4

File number

2

 

14

49-64

A16

File name

ERS2.SAR.SLCIMGY

 

15

65-68

A4

Record sequence and location type flag

FSEQ

 

16

69-76

I8

Sequence number location

1

 

17

77-80

I4

Sequence number field length

4

 

18

81-84

A4

Record code and location type flag

FTYP

 

19

85-92

I8

Record code location

5

 

20

93-96

I4

Record code field length

4

 

21

97-100

A4

Record length and location type flag

FLGT

 

22

101-108

I8

Record length location

9

 

23

109-112

I4

Record length field length

4

 

24-27

113-116

A1

Reserved

   

28

117-180

A64

Reserved segment

   
SAR DATA IMAGERY OPTIONS FILE, FILE DESCRIPTOR RECORD (VARIABLE SEGMENT)

29

181-186

I6

Number of SAR DATA records (nominal) (Depending on product type)

014213

 

30

187-192

I6

SAR DATA record length (Depending on product type)

010012

bytes

31

193-216

A24

Reserved

   
SAMPLE GROUP DATA

32

217-220

I4

Number of bits per sample

32

 

33

221-224

I4

Number of samples per data group (or pixels)

1

 

34

225-228

I4

Number of bytes per data group(or pixels)

4

 

35

229-232

A4

Justification and order of samples within data group (Not provided)

   
SAR RELATED DATA IN THE RECORD

36

233-236

I4

Number of SAR channels in this file

1

 

37

237-244

I8

Number of lines per data set (nominal) (Depending on product type)

00014213

 

38

245-248

I4

Number of left border pixels per line

0

 

39

249-256

I8

Total number of data groups per line per SAR channel (Depending on product type)

00002500

 

40

257-260

I4

Number of right border pixels per line

0007

 

41

261-264

I4

Number of topborder lines

0

 

42

265-268

I4

Number of bottom border lines

0

 

43

269-272

A4

Interleaving indicator

BSQ

 
RECORD DATA IN THE FILE

44

273-274

I2

Number of physical records per line

1

 

45

275-276

I2

Number of physical records per multi-channel line

1

 

46

277-280

I4

Number of bytes of prefix data per record

0

 

47

281-288

I8

Number of bytes of SAR data(or pixel data) per record (nominal) (Depending on product type)

00010000

 

48

289-292

I4

Number of bytes of suffix data per record

0

 

49-55

293-340

A48

Reserved

   

56

341-368

A28

Blanks

   

57-60

369-400

A32

Reserved

   

61

401-428

A28

SAR Data format type identifier

COMPLEX INTEGER

 

62

429-432

A4

SAR Data format type code

CI *4

 

63

433-436

I4

Number of left fill bits within pixel

0

 

64

437-440

I4

Number of right fill bits within pixel

0

 

65

441-448

I8

Maximum data range of pixel

32767

 

66

449-EOR

A15564

Spare

   

 

Table 12: IMAGERY OPTIONS FILE, PROCESSED DATA RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

2

 

2

5

B1

1st record sub-type code

50

 

3

6

B1

Record sub-type code

11

 

4

7

B1

2nd record sub-type code

31

 

5

8

B1

3rd record sub-type code

20

 

6

9-12

B4

Length of this record (nominal) (Depending on product type)

10012

 

7

13-16

C4

First sample of image line (Real and Imaginary part)

   

8

17-20

C4

Second sample of image line (Real and Imaginary part)

   

...

...

...

....

   

5006

10009-10012

C4

Last sample of image line (Real and Imaginary part)

   

 

5. NULL VOLUME FORMAT DEFINITION

Table 13: NULL VOLUME DESCRIPTOR RECORD

FIELD

BYTES

FORMAT

DESCRIPTION

EXAMPLE with

SLC product

UNITS

 

1

1-4

B4

Record sequence number

1

 

2

5

B1

1st record sub-type code

192

 

3

6

B1

Record sub-type code

192

 

4

7

B1

2nd record sub-type code

63

 

5

8

B1

3rd record sub-type code

18

 

6

9-12

B4

Length of this record

360

 

7

13-14

A2

ASCII/EBCDIC flag

A

 

8

15-16

A2

Blanks

   

9

17-28

A12

Format control document

CCB-CCT-0002

 

10

29-30

A2

Superstructure document

E

 

11

31-32

A2

Superstructure record format revision

A

 

12

33-44

A12

Logical volume generating facility software release and revision level

ERS2-SLC-6.2

 

13

45-60

A16

ID of physical volume containing this volume descriptor

1

 

14

61-76

A16

Logical volume identifier

0005231100005069

 

15

77-92

A16

Volume set identifier

199508 41035 838

 

16

93-94

I2

Total number of physical volumes in the logical volume

1

 

17

95-96

I2

Physical volume sequence number of the first tape within the logical volume

1

 

18

97-98

I2

Physical volume sequence number of the last tape in the logical volume

1

 

19

99-100

I2

Physical volume sequence number of the current tape within the logical volume

1

 

20

101-104

I4

First referenced file number in this physical volume within the logical volume

1

 

21

105-108

I4

Logical volume within a volume set

1

 

22

109-112

I4

Logical volume number within physical volume

1

 

23

113-120

A8

Logical volume creation date (YYYYMMDD)

19980505

 

24

121-128

A8

Logical volume creation time (hhmmssdd, dd-deci-seconds) (dd not provided)

08383523

 

25

129-140

A12

Logical volume generation country(GERMANY, ENGLAND, ITALY )

GERMANY

 

26

141-148

A8

Logical volume agency

ESA

 

27

149-160

A12

Logical volume generating facility(D-PAF,UK-PAF, IPAF(ASI), ES, ,MS, KS, FS)

D-PAF

 

28

161-164

I4

Number of file pointer records in volume directory

0

 

29

165-168

I4

Number of records in volume directory

1

 

30

169-260

A92

Volume descriptor spare segment(always blank filled)

   

31

261-360

A100

Local use segment (Not provided)

   

 

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry