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Geolocation Grid ADSRs
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Level 0 MDSR
SPH for auxiliary data with N=1 DSDs
ASAR WVI Product SPH
SQ ADSRs
Wave Mode Geolocation ADS
ASAR Wave Mode Products Base SPH
Slant Range to Ground Range conversion parameters
SQ ADSRs
Measurement Data Set containing spectra. 1 MDSR per spectra.
Ocean Wave Spectra
Map Projection parameters
ASAR Image Products SPH
Measurement Data Set 1
Auxilliary Products
ASA_XCH_AX: ASAR External characterization data
ASA_XCA_AX: ASAR External calibration data
ASA_INS_AX: ASAR Instrument characterization
ASA_CON_AX: ASAR Processor Configuration
Browse Products
ASA_WS__BP: ASAR Wide Swath Browse Image
ASA_IM__BP: ASAR Image Mode Browse Image
ASA_GM__BP: ASAR Global Monitoring Mode Browse Image
ASA_AP__BP: ASAR Alternating Polarization Browse Image
Level 0 Products
ASA_WV__0P: ASAR Wave Mode Level 0
ASA_WS__0P: ASAR Wide Swath Mode Level 0
ASA_MS__0P: ASAR Level 0 Module Stepping Mode
ASA_IM__0P: ASAR Image Mode Level 0
ASA_GM__0P: ASAR Global Monitoring Mode Level 0
ASA_EC__0P: ASAR Level 0 External Characterization
ASA_APV_0P: ASAR Alternating Polarization Level 0 (Cross polar V)
ASA_APH_0P: ASAR Alternating Polarization Level 0 (Cross polar H)
ASA_APC_0P: ASAR Alternating Polarization Level 0 (Copolar)
Level 1 Products
ASA_IMS_1P: ASAR Image Mode Single Look Complex
ASA_IMP_1P: ASAR Image Mode Precision Image
ASA_IMM_1P: ASAR Image Mode Medium Resolution Image
ASA_IMG_1P: ASAR Image Mode Ellipsoid Geocoded Image
ASA_GM1_1P: ASAR Global Monitoring Mode Image
ASA_APS_1P: ASAR Alternating Polarization Mode Single Look Complex
ASA_APP_1P: ASAR Alternating Polarization Mode Precision Image
ASA_APM_1P: ASAR Alternating Polarization Medium Resolution Image product
ASA_WSS_1P: Wide Swath Mode SLC Image
ASA_WVS_1P: ASAR Wave Mode Imagette Cross Spectra
ASA_WSM_1P: ASAR Wide Swath Medium Resolution Image
ASA_APG_1P: ASAR Alternating Polarization Ellipsoid Geocoded Image
Level 2 Products
ASA_WVW_2P: ASAR Wave Mode Wave Spectra
ASAR Glossary Terms
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6.6.11 ASAR Image Products SPH

The Specific Product Header (SPH) is a one record, fixed length and format, ASCII header that contains general information applicable to the whole product. ( See " Definitions and Conventions " 2.3. in chapter 2 ).

The philosophy of the ASAR SPH is to provide only basic information needed to evaluate the product, and only information which applies to both an individual stand-alone product or a full stripline product . Thus, the image products SPH contents, other than positioning information and some minor Data Set Descriptor (DSD) values, will not need to be updated during stripline formation or child product extraction. The format will be identical for all ASAR image products, whether they are stand-alone, slice , archived stripline, or child products extracted from a stripline. The description of the image product SPH is shown below:

Note that the symbol " " is used throughout this handbook to denote a blank space.


Table 6.47 ASAR Image Products SPH

ASAR Image Products SPH

# Description Units Count Type Size
Data Record
0 sph_descriptor_title
SPH_DESCRIPTOR=
keyword 1 AsciiString 15 byte(s)
1 quote_1
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
2 sph_descriptor
SPH Descriptor

ASCII string describing the product

ascii 1 AsciiString 28 byte(s)
3 quote_2
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
4 newline_char_1
newline character
terminator 1 AsciiString 1 byte(s)
5 strip_cont_ind_title
STRIPLINE_CONTINUITY_INDICATOR=
keyword 1 AsciiString 31 byte(s)
6 stripline_continuity_indicator
Strip line continuity indicator

Value = +000 for no stripline, otherwise is incremented for each stripline product in the orbit

- 1 Ac 4 byte(s)
7 newline_char_101
newline character
terminator 1 AsciiString 1 byte(s)
8 slice_pos_title
SLICE_POSITION=
keyword 1 AsciiString 15 byte(s)
9 slice_position
Slice position in the stripline

Value: +001 to NUM_SLICES, Set to +001 if not stripline

- 1 Ac 4 byte(s)
10 newline_char_102
newline character
terminator 1 AsciiString 1 byte(s)
11 num_slices_title
NUM_SLICES=
keyword 1 AsciiString 11 byte(s)
12 num_slices
Number of slices in the stripline. Default = +001 for non-stripline product
- 1 Ac 4 byte(s)
13 newline_char_103
newline character
terminator 1 AsciiString 1 byte(s)
14 first_line_time_title
FIRST_LINE_TIME=
keyword 1 AsciiString 16 byte(s)
15 quote_3
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
16 first_line_time
First Zero Doppler Azimuth time of product

UTC Time of first range line in the MDS of this product.

UTC 1 UtcExternal 27 byte(s)
17 quote_4
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
18 newline_char_2
newline character
terminator 1 AsciiString 1 byte(s)
19 last_line_time_title
LAST_LINE_TIME=
keyword 1 AsciiString 15 byte(s)
20 quote_5
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
21 last_line_time
Last Zero Doppler Azimuth time of product

Time of last range line in the MDS of this product.

UTC 1 UtcExternal 27 byte(s)
22 quote_6
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
23 newline_char_3
newline character
terminator 1 AsciiString 1 byte(s)
24 first_near_lat_title
FIRST_NEAR_LAT=
keyword 1 AsciiString 15 byte(s)
25 first_near_lat
Geodetic Latitude of the first sample of the first line A negative value denotes south latitude, a positive value denotes North latitude
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
26 first_near_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
27 newline_char_4
newline character
terminator 1 AsciiString 1 byte(s)
28 first_near_long_title
FIRST_NEAR_LONG=
keyword 1 AsciiString 16 byte(s)
29 first_near_long
East geodetic longitude of the first sample of the first line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
30 first_near_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
31 newline_char_5
newline character
terminator 1 AsciiString 1 byte(s)
32 first_mid_lat_title
FIRST_MID_LAT=
keyword 1 AsciiString 14 byte(s)
33 first_mid_lat
Geodetic Latitude of the middle sample of the first line A negative value denotes south latitude, a positive value denotes North latitude
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
34 first_mid_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
35 newline_char_6
newline character
terminator 1 AsciiString 1 byte(s)
36 first_mid_long_title
FIRST_MID_LONG=
keyword 1 AsciiString 15 byte(s)
37 first_mid_long
East geodetic longitude of the middle sample of the first line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
38 first_mid_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
39 newline_char_7
newline character
terminator 1 AsciiString 1 byte(s)
40 first_far_lat_title
FIRST_FAR_LAT=
keyword 1 AsciiString 14 byte(s)
41 first_far_lat
Geodetic Latitude of the last sample of the first line A negative value denotes south latitude, a positive value denotes North latitude
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
42 first_far_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
43 newline_char_8
newline character
terminator 1 AsciiString 1 byte(s)
44 first_far_long_title
FIRST_FAR_LONG=
keyword 1 AsciiString 15 byte(s)
45 first_far_long
East geodetic longitude of the last sample of the first line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
46 first_far_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
47 newline_char_9
newline character
terminator 1 AsciiString 1 byte(s)
48 last_near_lat_title
LAST_NEAR_LAT=
keyword 1 AsciiString 14 byte(s)
49 last_near_lat
Geodetic Latitude of the first sample of the last line A negative value denotes south latitude, a positive value denotes North latitude
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
50 last_near_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
51 newline_char_10
newline character
terminator 1 AsciiString 1 byte(s)
52 last_near_long_title
LAST_NEAR_LONG=
keyword 1 AsciiString 15 byte(s)
53 last_near_long
East geodetic longitude of the first sample of the last line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
54 last_near_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
55 newline_char_11
newline character
terminator 1 AsciiString 1 byte(s)
56 last_mid_lat_title
LAST_MID_LAT=
keyword 1 AsciiString 13 byte(s)
57 last_mid_lat
Geodetic Latitude of the middle sample of the last line A negative value denotes south latitude, a positive value denotes North latitude

A negative value denotes south latitude, a positive value denotes North latitude

(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
58 last_mid_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
59 newline_char_12
newline character
terminator 1 AsciiString 1 byte(s)
60 last_mid_long_title
LAST_MID_LONG=
keyword 1 AsciiString 14 byte(s)
61 last_mid_long
East geodetic longitude of the middle sample of the last line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
62 last_mid_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
63 newline_char_13
newline character
terminator 1 AsciiString 1 byte(s)
64 last_far_lat_title
LAST_FAR_LAT=
keyword 1 AsciiString 13 byte(s)
65 last_far_lat
Geodetic Latitude of the last sample of the last line A negative value denotes south latitude, a positive value denotes North latitude

A negative value denotes south latitude, a positive value denotes North latitude

(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
66 last_far_lat_units
<10-6degN>
units 1 AsciiString 10 byte(s)
67 newline_char_14
newline character
terminator 1 AsciiString 1 byte(s)
68 last_far_long_title
LAST_FAR_LONG=
keyword 1 AsciiString 14 byte(s)
69 last_far_long
East geodetic longitude of the last sample of the last line.Positive values East of Greenwich, negative values west of Greenwich.
(1e-6) degrees 1 AsciiGeoCoordinate 11 byte(s)
70 last_far_long_units
<10-6degE>
units 1 AsciiString 10 byte(s)
71 newline_char_15
newline character
terminator 1 AsciiString 1 byte(s)
72 spare_1
Spare
- 1 SpareField 36 byte(s)
73 swath_title
SWATH=
keyword 1 AsciiString 6 byte(s)
74 quote_7
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
75 swath
Swath number

IS1, IS2, IS3, IS4, IS5, IS6, or IS7 for IM, and AP modes. Set to WS�� for WS and GM modes.

ascii 1 AsciiString 3 byte(s)
76 quote_8
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
77 newline_char_17
newline character
terminator 1 AsciiString 1 byte(s)
78 pass_title
PASS=
keyword 1 AsciiString 5 byte(s)
79 quote_9
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
80 pass
Ascending or descending orbit designator (defined at start of time pass)

ASCENDING��, DESCENDING or FULL��ORBIT

ascii 1 AsciiString 10 byte(s)
81 quote_10
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
82 newline_char_18
newline character
terminator 1 AsciiString 1 byte(s)
83 sample_type_title
SAMPLE_TYPE=
keyword 1 AsciiString 12 byte(s)
84 quote_11
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
85 sample_type
Detected or complex sample type designator

DETECTED or COMPLEX��

ascii 1 AsciiString 8 byte(s)
86 quote_12
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
87 newline_char_19
newline character
terminator 1 AsciiString 1 byte(s)
88 algorithm_title
ALGORITHM=
keyword 1 AsciiString 10 byte(s)
89 quote_13
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
90 algorithm
Processing Algorithm Used

RAN/DOP or SPECAN��

ascii 1 AsciiString 7 byte(s)
91 quote_14
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
92 newline_char_20
newline character
terminator 1 AsciiString 1 byte(s)
93 mds1_polar_title
MDS1_TX_RX_POLAR=
keyword 1 AsciiString 17 byte(s)
94 quote_15
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
95 mds1_tx_rx_polar
Transmitter / Receiver Polarisation for MDS 1

H/V or H/H or V/H or V/V

ascii 1 AsciiString 3 byte(s)
96 quote_16
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
97 newline_char_21
newline character
terminator 1 AsciiString 1 byte(s)
98 mds2_polar_title
MDS2_TX_RX_POLAR=
keyword 1 AsciiString 17 byte(s)
99 quote_17
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
100 mds2_tx_rx_polar
Transmitter/ Receiver Polarisation for MDS2

H/V or H/H or V/H or V/V or blank (������) for all modes with only one MDS.

ascii 1 AsciiString 3 byte(s)
101 quote_18
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
102 newline_char_22
newline character
terminator 1 AsciiString 1 byte(s)
103 compression_title
COMPRESSION=
keyword 1 AsciiString 12 byte(s)
104 quote_19
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
105 compression
Compression algorithm used on echo data on-board the satellite

FBAQ2, FBAQ3, FBAQ4 (FBAQ: 8 bits reduced to 2, 3, and 4 bits respectively). Others: S&M4��, and NONE��

ascii 1 AsciiString 5 byte(s)
106 quote_20
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
107 newline_char_23
newline character
terminator 1 AsciiString 1 byte(s)
108 azimuth_looks_title
AZIMUTH_LOOKS=
keyword 1 AsciiString 14 byte(s)
109 azimuth_looks
Number of Looks in Azimuth
looks 1 Ac 4 byte(s)
110 newline_char_24
newline character
terminator 1 AsciiString 1 byte(s)
111 range_looks_title
RANGE_LOOKS=
keyword 1 AsciiString 12 byte(s)
112 range_looks
Number of Looks in Range
looks 1 Ac 4 byte(s)
113 newline_char_25
newline character
terminator 1 AsciiString 1 byte(s)
114 range_spacing_title
RANGE_SPACING=
keyword 1 AsciiString 14 byte(s)
115 range_spacing
Range sample spacing in meters
m 1 Afl 15 byte(s)
116 range_spacing_units
<m>
units 1 AsciiString 3 byte(s)
117 newline_char_26
newline character
terminator 1 AsciiString 1 byte(s)
118 azimuth_spacing_title
AZIMUTH_SPACING=
keyword 1 AsciiString 16 byte(s)
119 azimuth_spacing
Nominal azimuth sample spacing in meters
m 1 Afl 15 byte(s)
120 azimuth_spacing_units
<m>
units 1 AsciiString 3 byte(s)
121 newline_char_27
newline character
terminator 1 AsciiString 1 byte(s)
122 line_time_interval_title
LINE_TIME_INTERVAL=
keyword 1 AsciiString 19 byte(s)
123 line_time_interval
Azimuth sample spacing in time (Line Time Interval)
s 1 Afl 15 byte(s)
124 line_time_interval_units
<s>
units 1 AsciiString 3 byte(s)
125 newline_char_28
newline character
terminator 1 AsciiString 1 byte(s)
126 line_length_title
LINE_LENGTH=
keyword 1 AsciiString 12 byte(s)
127 line_length
Number of samples per output line (includes zero filled samples)

If a complex product, 1 sample = 1 I,Q pair, for a detected product, 1 sample = 1 pixel.

samples 1 As 6 byte(s)
128 line_length_units
<samples>
units 1 AsciiString 9 byte(s)
129 newline_char_29
newline character
terminator 1 AsciiString 1 byte(s)
130 data_type_title
DATA_TYPE=
keyword 1 AsciiString 10 byte(s)
131 quote_21
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
132 data_type
Output data type

SWORD, UWORD, or UBYTE. The definition of a word here is a 16 bit integer

ascii 1 AsciiString 5 byte(s)
133 quote_22
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
134 newline_char_30
newline character
terminator 1 AsciiString 1 byte(s)
135 spare_2
Spare
- 1 SpareField 51 byte(s)
Record Length : 1059

DS_NAME : ASAR Image Products SPH



Format Version 114.0  

Note: following field# 34, within the SPH header, are the Data Set Descriptors (DSDs) . What follows here are those DSDs, beginning at field# 35:

Table 6.48
Data Set Descriptors for Data included with the product
35
DSD (A) for SQ for MDS 1 ADS
36
DSD (A) for SQ for MDS2 ADS
(filled only for AP products , set to NOT USED otherwise )
37
DSD (A) for Main Processing parameters ADS
38
DSD (A) for Doppler Centroid Coefficients 2.6.1.2.2. ADS
39
DSD (A) for Slant Range to Ground Range Conversion ADS
(set to NOT USED for SLC products and geocoded products )
40
DSD (A) for Chirp parameters ADS
41
DSD (A) for Antenna Elevation Pattern for MDS 1 ADS
(set to NOT USED for SLC products )
42
DSD (A) for Antenna Elevation Pattern for MDS 2 ADS
(filled only for AP products, set to NOT USED otherwise. Also, set to NOT USED for SLC products )
43
DSD (A) for the Geolocation Grid ADS (LADS)
44
DSD (G) for Map Projection parameters GADS
(filled only for geocoded products, set to NOT USED otherwise )
45
DSD (M) for MDS1 (image data 1)
46
DSD (M) for MDS2 (image data 2)
(filled only for AP products, set to NOT USED otherwise )
Data Set Descriptors for referenced files
47
DSD referencing the Level 0 product from which this product was created
48
DSD referencing PF-ASAR Processor Configuration file
(contains software parameters used by the processor and threshold values for PCD information )
49
DSD referencing Instrument Characterisation file used
Contains LUT s for ADC and data decompression, antenna elevation patterns , and other static instrument characteristics
50
DSD referencing External Characterisation file used
51
DSD referencing External Calibration file used
52
DSD referencing the Orbit State Vectors file used