ASAR WVI Product SPH

24-Jul-2014

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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

Search
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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 , and , of the first and last wavelength bins . Field 12 gives the number of bins, . The formula for reconstructing the wavelengths, , for each wavelength bin, m , from these first and last values is as follows:

For Level 1 WVI and WVS products:

For Level 2 WVW products:

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.

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6.6.22 ASAR WVI Product SPH

Table 6.60 ASAR WVI Product SPH