ESA Earth Home Missions Data Products Resources Applications
    24-Jul-2014
EO Data Access
How to Apply
How to Access
Index
Credits
ASAR Data Formats Products
Records
Geolocation Grid ADSRs
Doppler Centroid parameters
Chirp parameters
Antenna Elevation pattern
ASAR external characterization data
ASAR external calibration data
Level 0 SPH
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
Sea Ice Glossary
Land Glossary
Oceans Glossary
Geometry Glossary
ASAR Instrument Glossary
Acronyms and Abbreviations
ASAR Frequently Asked Questions
The ASAR Instrument
Instrument Characteristics and Performance
Inflight Performance Verification
Preflight Characteristics and Expected Performance
Instrument Description
Internal Data Flow
ASAR Instrument Functionality
Payload Description and Position on the Platform
ASAR Products and Algorithms
Auxiliary Products
Common Auxiliary Data Sets
Auxiliary Data Sets for Level 1B Processing
Summary of Auxiliary Data Sets
Instrument-specific Topics
Level 2 Product and Algorithms
Level 2 Product
ASAR Level 2 Algorithms
Level 1B Products
Descalloping
Range-Doppler
ASAR Level 0 Products
Level 0 Instrument Source Packet Description
Product Evolution History
Definitions and Conventions
Conventions
Organisation of Products
ASAR Data Handling Cookbook
Hints and Algorithms for Higher Level Processing
Hints and Algorithms for Data Use
ASAR Characterisation and Calibration
References
Notes
The Derivation of Backscattering Coefficients and RCSs in ASAR Products
External Characterisation
Internal Calibration
Pre-flight Characterisation Measurements
ASAR Latency Throughput and Data Volume
Data Volume
Throughput
Latency
Products and Algorithms Introduction
Child Products
The ASAR User Guide
Image Gallery
Further Reading
How to Use ASAR Data
Software Tools
How to Choose ASAR Data
Special Features of ASAR
Geophysical Coverage
Principles of Measurement
Scientific Background
Geophysical Measurements
ASAR Product Handbook
ASAR instrument characterization data
Wave Mode processing parameters
ASAR processor configuration data
Main Processing parameters
ASA_WVI_1P: ASAR Wave Mode SLC Imagette and Imagette Cross Spectra
Product Terms
RADAR and SAR Glossary
Level 1B Products
Summary of Applications vs Products
Services
Site Map
Frequently asked questions
Glossary
Credits
Terms of use
Contact us
Search


 
 
 


6.6.22 ASAR WVI Product SPH

The ASAR Wave Mode (WV) Specific Product Header (SPH) provides only the information which applies to all wave cells within a product file. The format will be identical for all ASAR wave products, except for the Data Set Descriptors (DSD) sections.

The ASAR Wave Mode Products SPH contents are shown below:


Table 6.60 ASAR WVI Product SPH

ASAR WVI Product 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 first_cell_time_title
FIRST_CELL_TIME=
keyword 1 AsciiString 16 byte(s)
6 quote_3
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
7 first_cell_time
First Zero Doppler Azimuth time of first line of first imagette

UTC Time of first range line in the MDS containing the first imagette used to produce product.

UTC 1 UtcExternal 27 byte(s)
8 quote_4
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
9 newline_char_2
newline character
terminator 1 AsciiString 1 byte(s)
10 last_cell_time_title
LAST_CELL_TIME=
keyword 1 AsciiString 15 byte(s)
11 quote_5
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
12 last_cell_time
Last Zero Doppler Azimuth time of first line of last imagette

UTC Time of the first range line in the MDS containing the last imagette used to produce this product.

UTC 1 UtcExternal 27 byte(s)
13 quote_6
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
14 newline_char_3
newline character
terminator 1 AsciiString 1 byte(s)
15 spare_1
Spare
- 1 SpareField 51 byte(s)
16 swath1_title
SWATH_1=
keyword 1 AsciiString 8 byte(s)
17 quote_7
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
18 swath_1
First sub-cycle swath number IS1, IS2, IS3, IS4, IS5, IS6, or IS7.
ascii 1 AsciiString 3 byte(s)
19 quote_8
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
20 newline_char_5
newline character
terminator 1 AsciiString 1 byte(s)
21 swath2_title
SWATH_2=
keyword 1 AsciiString 8 byte(s)
22 quote_9
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
23 swath_2
Second sub-cycle swath number IS1, IS2, IS3, IS4, IS5, IS6, or IS7.
ascii 1 AsciiString 3 byte(s)
24 quote_10
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
25 newline_char_6
newline character
terminator 1 AsciiString 1 byte(s)
26 pass_title
PASS=
keyword 1 AsciiString 5 byte(s)
27 quote_11
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
28 pass
Ascending or descending orbit designator (defined at start of time pass)

ASCENDING��, DESCENDING or FULL��ORBIT

ascii 1 AsciiString 10 byte(s)
29 quote_12
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
30 newline_char_7
newline character
terminator 1 AsciiString 1 byte(s)
31 polar_title
TX_RX_POLAR=
keyword 1 AsciiString 12 byte(s)
32 quote_13
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
33 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)
34 quote_14
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
35 newline_char_8
newline character
terminator 1 AsciiString 1 byte(s)
36 compression_title
COMPRESSION=
keyword 1 AsciiString 12 byte(s)
37 quote_15
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
38 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&M��, and NONE��

ascii 1 AsciiString 5 byte(s)
39 quote_16
quotation mark ("""")
ascii 1 AsciiString 1 byte(s)
40 newline_char_9
newline character
terminator 1 AsciiString 1 byte(s)
41 spare_2
Spare
- 1 SpareField 51 byte(s)
42 num_dir_bins_title
NUM_DIR_BINS=
keyword 1 AsciiString 13 byte(s)
43 num_dir_bins
Number of Directional Bins
- 1 Ac 4 byte(s)
44 newline_char_11
newline character
terminator 1 AsciiString 1 byte(s)
45 num_wl_bins_title
NUM_WL_BINS=
keyword 1 AsciiString 12 byte(s)
46 num_wl_bins
Number of Wavelength Bins
- 1 Ac 4 byte(s)
47 newline_char_12
newline character
terminator 1 AsciiString 1 byte(s)
48 first_dir_bin_title
FIRST_DIR_BIN=
keyword 1 AsciiString 14 byte(s)
49 first_dir_bin
First Directional Bin
degrees 1 Afl 15 byte(s)
50 first_dir_units
<degrees>
units 1 AsciiString 9 byte(s)
51 newline_char_13
newline character
terminator 1 AsciiString 1 byte(s)
52 dir_bin_step_title
DIR_BIN_STEP=
keyword 1 AsciiString 13 byte(s)
53 dir_bin_step
Directional Bin Step
degrees 1 Afl 15 byte(s)
54 die_bin_step_units
<degrees>
units 1 AsciiString 9 byte(s)
55 newline_char_14
newline character
terminator 1 AsciiString 1 byte(s)
56 first_wl_bin_title
FIRST_WL_BIN=
keyword 1 AsciiString 13 byte(s)
57 first_wl_bin
First Wavelength Bin

Longest Wavelength

m 1 Afl 15 byte(s)
58 first_wl_bin_units
<m>
units 1 AsciiString 3 byte(s)
59 newline_char_15
newline character
terminator 1 AsciiString 1 byte(s)
60 last_wl_bin_title
LAST_WL_BIN=
keyword 1 AsciiString 12 byte(s)
61 last_wl_bin
Last Wavelength Bin

Shortest Wavelength (NOTE: Logarithmic steps)

m 1 Afl 15 byte(s)
62 last_wl_bin_units
<m>
units 1 AsciiString 3 byte(s)
63 newline_char_16
newline character
terminator 1 AsciiString 1 byte(s)
64 spare_3
Spare
- 1 SpareField 51 byte(s)
65 look_sep_title
LOOK_SEP=
keyword 1 AsciiString 9 byte(s)
66 look_sep
Look Separation period in seconds (second = 1/Hz).

For the Ocean Wave Spectra, this is the time period between first and last looks.

s 1 Afl 15 byte(s)
67 look_sep_units
<s>
units 1 AsciiString 3 byte(s)
68 newline_char_18
newline character
terminator 1 AsciiString 1 byte(s)
69 look_bw_title
LOOK_BW=
keyword 1 AsciiString 8 byte(s)
70 look_bw
Look bandwidth used during spectra processing
Hz 1 Afl 15 byte(s)
71 look_bw_units
<Hz>
units 1 AsciiString 4 byte(s)
72 newline_char_19
newline character
terminator 1 AsciiString 1 byte(s)
73 filter_order_title
FILTER_ORDER=
keyword 1 AsciiString 13 byte(s)
74 filter_order
Order of Butterworth filter used during cross-spectra processingIf set to zero, a Gaussian filter was applied
- 1 Ac 4 byte(s)
75 newline_char_20
newline character
terminator 1 AsciiString 1 byte(s)
76 trend_removal_title
TREND_REMOVAL=
keyword 1 AsciiString 14 byte(s)
77 trend_removal
Trend Removal applied during cross spectra computation0 = trend removal not applied1 = trend removal applied
ascii 1 AsciiString 1 byte(s)
78 newline_char_21
newline character
terminator 1 AsciiString 1 byte(s)
79 antenna_corr_title
ANTENNA_CORR=
keyword 1 AsciiString 13 byte(s)
80 antenna_corr
Antenna gain correction applied during cross spectra computation

(note: Antenna Elevation gain correction is never applied to the SLC imagette) 0 = not applied 1 = applied

ascii 1 AsciiString 1 byte(s)
81 newline_char_22
newline character
terminator 1 AsciiString 1 byte(s)
82 srgr_title
SR_GR=
keyword 1 AsciiString 6 byte(s)
83 sr_gr
Slant range to ground range conversion applied during cross spectra computation

(note: Slant range to ground range conversion is never applied to the SLC imagette) 0 = not applied 1 = applied

ascii 1 AsciiString 1 byte(s)
84 newline_char_23
newline character
terminator 1 AsciiString 1 byte(s)
85 cc_window_title
CC_WINDOW=
keyword 1 AsciiString 10 byte(s)
86 cc_window
Cross covariance window function was applied during cross spectra computation

0 = not applied 1 = applied

ascii 1 AsciiString 1 byte(s)
87 newline_char_24
newline character
terminator 1 AsciiString 1 byte(s)
88 spare_4
Spare
- 1 SpareField 30 byte(s)
89 num_look_pairs_title
NUM_LOOK_PAIRS=
keyword 1 AsciiString 15 byte(s)
90 num_look_pairs
Number of look pairs in cross spectrum processing
- 1 Ac 4 byte(s)
91 newline_char_26
newline character
terminator 1 AsciiString 1 byte(s)
92 cc_range_bins_title
CC_RANGE_BINS=
keyword 1 AsciiString 14 byte(s)
93 cc_range_bins
Range bins in Cross covariance estimation
- 1 Al 11 byte(s)
94 newline_char_27
newline character
terminator 1 AsciiString 1 byte(s)
95 cc_az_bins_title
CC_AZIMUTH_BINS=
keyword 1 AsciiString 16 byte(s)
96 cc_azimuth_bins
Azimuth bins in Cross covariance estimation
- 1 Al 11 byte(s)
97 newline_char_28
newline character
terminator 1 AsciiString 1 byte(s)
98 cc_half_width_title
CC_HALF_WIDTH=
keyword 1 AsciiString 14 byte(s)
99 cc_half_width
Half-width of the cross-covariance window function
m 1 Afl 15 byte(s)
100 cc_half_width_units
<m>
units 1 AsciiString 3 byte(s)
101 newline_char_29
newline character
terminator 1 AsciiString 1 byte(s)
102 imagettes_failed_title
IMAGETTES_FAILED=
keyword 1 AsciiString 17 byte(s)
103 imagettes_failed
Number of imagettes PF-ASAR failed to produce in this product
- 1 Ac 4 byte(s)
104 newline_char_30
newline character
terminator 1 AsciiString 1 byte(s)
105 spectra_failed_title
SPECTRA_FAILED=
keyword 1 AsciiString 15 byte(s)
106 spectra_failed
Number of cross or ocean wave spectra PF-ASAR failed to produce in this product
- 1 Ac 4 byte(s)
107 newline_char_31
newline character
terminator 1 AsciiString 1 byte(s)
108 imagettes_made_title
IMAGETTES_MADE=
keyword 1 AsciiString 15 byte(s)
109 imagettes_made
number of imagettes successfully produced by the PF-ASAR processor
- 1 Ac 4 byte(s)
110 newline_char_32
newline character
terminator 1 AsciiString 1 byte(s)
111 spectra_made_title
SPECTRA_MADE=
keyword 1 AsciiString 13 byte(s)
112 spectra_made
Number of cross spectra or ocean wave spectra successfully produced by PF-ASAR in this product
- 1 Ac 4 byte(s)
113 newline_char_33
newline character
terminator 1 AsciiString 1 byte(s)
114 spare_5
Spare
- 1 SpareField 10 byte(s)
Record Length : 901

DS_NAME : ASAR WVI Product SPH



Format Version 114.0  

The ASA_WVI 2.6.2.1.2. product SPH contains up to a maximum of 411 DSD s (including the spare DSD). The actual number of SLC Imagette DSDs is determined at run time and can be derived from the SPH as the sum of Fields #32 and #30 (i.e. as the sum of the number of Imagettes_Made and the number of Imagettes_Failed respectively).

Note that the SLC Imagette Measurement Data Set (MDS) size and number of Measurement Data Set Records (MDSRs) may differ from cell to cell.

Fields #15 and #16 of the SPH give the wavelengths , image and image , of the first and last wavelength bins . Field 12 gives the number of bins, image . The formula for reconstructing the wavelengths, image , for each wavelength bin, m , from these first and last values is as follows:

For Level 1 WVI and WVS products:

image

For Level 2 WVW products:

image







Table 6.61
Data Set Descriptors (DSDs) for referenced files
35
DSD referencing the Level 0 product from which this product was created
-
280
dsd
36
DSD referencing PF-ASAR Processor Configuration file

(contains software parameters used by the processor and threshold values for PCD information)

-
280
dsd
37
DSD referencing Instrument Characterisation file used

Contains LUT s for ADC and data decompression, antenna elevation patterns , and other static instrument characteristics

-
280
dsd
38
DSD referencing External Characterisation file used
-
280
dsd
39
DSD referencing External Calibration file used
-
280
dsd
40
DSD referencing the Orbit State Vectors file used
-
280
dsd
41
DSD referencing the ECWMF file used
-
280
dsd
Data Set Descriptors for Data included with the product
42
DSD for SQ ADS
-
280
dsd
43
DSD Geolocation ADS (LADS)
-
280
dsd
44
DSD for Processing parameters ADS
-
280
dsd
45
DSD for the Cross Spectra or Ocean Wave Spectra MDS
-
280
dsd
46
DSD for SLC Imagettes

There are up to 400 DSDs.The actual number is determined at run time and can be derived as the sum of Fields #32 and #30 above (i.e. the sum of Imagettes_Made and Imagettes_Failed respectively). Each DSD describes one MDS. Each MDS contains 1 imagette. These DSDs are included only for the WVI product .

-
N*280 where N is an integer up to 400
N*dsd
TOTAL
For WVS and WVW products:
For WVI product:
3981
up to max. of 115981



For a further discussion of this product, and the associated Data Sets (DS) refer to the section entitled " Level 1B Wave Products " 2.6.2.1.2.