ERS Wind product specifications.

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16-May-2012

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Main Product header Detailed Description
Field	Bytes	Type	Description
1	17	A/I	Product identifier (for ESA internal operational use only), i.e. a set of characters and integers which form a unique identifier. The set of 17 Bytes is defined as follows: Byte 1: Originator of logical schedule (for ESA internal use only) e.g.: I: MMCC/EECF, Immediate Command M: MMCC/EECF, Logical Schedule J: Local operator, Immediate Command K: Local operator, Logical Schedule Byte 2-5: Sequential Counter of Logical Schedule Byte 6-9: Unique Identification or Schedule Offset Byte 10-13: Not used, set to 0 Byte 14-17: Sequential Number of Currently Generated Product
2	1	I1	Type of Product, see Table 3
3	1	I1	Spacecraft 1: ERS-1 2: ERS-2
4	24	A	UTC time of subsatellite point at beginning of product. Format in ASCII: DD-MMM-YYYY hh:mm:ss.ttt For example: 30-JAN-1987 14:30:27.123
5	1	I1	Station ID, where data was processed 1: Kiruna Station (KS) 2: Fucino Station (FS) 3: Gatineau Station (GS) 4: Maspalomas Station (MS) 5: EECF Station (ES) 6: Prince Albert Station (PS) 7: ESRIN Center (EC)
6	2	B	Product Confidence Data bit 1 PCD Summary Flag 0: product correctly generated 1: at least one of the remaining 15 bits of the PCD in the MPH is set. In particular the specific header flags are not read when this bit is set. bit 2 - 3 spare bit 4 - 5 Downlink Performance and X-Band acquisition chain. This value summarizes the PCD snapshots rel. to the products. 0: performance better than MMCC/EECF-supplied minimum threshold 1: performance equal to or worse than threshold 2: performance unknown bit 6 - 7 HDDT Summary. This value summarizes the PCD snapshots rel. to the product. 1: performance equal to or worse than threshold 2: performance unknown bit 8 - 9 Frame Synchronizer. This value summarizes the PCD snapshots rel. to the product. 0: performance better than MMCC/EECF-supplied minimum threshold 1: performance equal to or worse than threshold 2: performance unknown bit 10 - 11 FS to Processor I/F The LRDPF and SARFDP reads the status of the FS interface. 0: no parity error detected 1: at least one parity error detected 2: performance unknown bit 12 - 13 Checksum Analysis on LR Frames. The percentage of source packets, featuring a checksum error, and used in the actual product is compared to a MMCC/EECF given threshold. 0: lower than threshold 1: greater than threshold 2: performance unknown bit 14 - 15 Quality of Downlinked Formats and Source Packets. The RA product is based on using 80 consecutive source packets. The percentage of erroneous ones is determined and compared to a MMCC/EECF given threshold. 1: greater than threshold 2: performance unknown bit 16 Existence of Auxiliary Data. 0: auxiliary data and/or chirp correctly extracted 1: not all auxiliary data extracted
7	24	A	UTC time when MPH was generated; Format as in field 4.
8	4	I4	Size of Specific Product Header: Record in Bytes
9	4	I4	Number of Product Data Set Records
10	4	I4	Size of each Product Data Set Record in Bytes
11	1	B	Subsystem that generated the product. 0: SARFDP 1 1: SARFDP 2 2: LRDPF 3: VMP 4: LRDTF
12	1	B	OBRC flag used for SAR products only bit 1 - 2 0: not used 1: OGRC data 2: OBRC data
13	24	A	UTC reference time. Time relation used to convert from satellite to ground, used together with the next two fields.
14	4	I4	Reference binary time of satellite clock (32-bit unsigned integer)
15	4	I4	Step length of satellite clock in nanoseconds
16	8	I2	Processor software version used to generate product. Format as defined by MMCC/EECF. 8 bytes = 4 words of integer x 2
17	2	I2	Threshold table version number.
18	2	B	Spare
19	24	A	UTC time of ascending node state vector
20-25	24	6I4	Ascending node state vector in earth-fixed reference system
20	4	I4	State vector; X in 10-2 m
21	4	I4	State vector; Y in 10-2 m
22	4	I4	State vector; Z in 10-2 m
23	4	I4	State vector; X velocity in 10-5 m/s
24	4	I4	State vector; Y velocity in 10-5 m/s
25	4	I4	State vector; Z velocity in 10-5 m/s

Specific Product Header for User Wind Product (UWI)
Field	Bytes	Type	Description	Units
1	2	B	Product Confidence Data for Processing bit 1 & 2: Processing equipment status 0: equipment working 1: some problems with equipment 2: equipment failed during product generation bit 3: Spare bit 4: I/Q Imbalance Flag 0: all beams better than MMCC/EECF-defined threshold 1: any beam above or equal to MMCC/EECF-defined threshold bit 5: Internal Calibration level flag 0: all beams within MMCC/EECF-defined level window 1: any beam out of MMCC/EECF-defined level window bit 6: Blank Product Flag 0: data available 1 no data available bit 7: Doppler Compensation: Center of Gravity flag 0: all beams below MMCC/EECF defined threshold 1: any beam above or equal to MMCC/EECF-defined threshold bit 8: Doppler Compensation: Standard Deviation flag 0: all beams below MMCC/EECF defined interval 1: any beam outside MMCC/EECF-defined interval bit 9 - 16: Spare	N/A
2	4	I4	Geodetic latitude of Product Center; A negative value denotes South latitude, and a positive value denotes North latitude.	10-3 deg
3	4	I4	East longitude (i.e. 0-360º) from Greenwich to East)	10-3 deg
4	4	I4	Subsatellite Track Heading w.r. to North, turning clockwise 0at time of product center	10-3 deg
5	2	I2	Mean distance between two successive along track nodes at product center	meter
6	2	I2	Center of Gravity of averaged power spectrum (forebeam)	2.344 Hz
7	2	I2	''Standard Deviation'' of averaged power spectrum (forebeam)	2.344 Hz
8	2	I2	Center of Gravity of averaged power spectrum (midbeam)	2.344 Hz
9	2	I2	''Standard Deviation'' of averaged power spectrum (midbeam)	2.344 Hz
10	2	I2	Center of Gravity of averaged power spectrum (aftbeam)	2.344 Hz
11	2	I2	''Standard Deviation'' of averaged power spectrum (aftbeam)	2.344 Hz
12	4	I4	I Mean Noise Power, forebeam	10-3 ADC units
13	4	I4	Q Mean Noise Power, forebeam	10-3 ADC units
14	4	I4	I Mean Noise Power, midbeam	10-3 ADC units
15	4	I4	Q Mean Noise Power, midbeam	10-3 ADC units
16	4	I4	I Mean Noise Power, aftbeam	10-3 ADC units
17	4	I4	Q Mean Noise Power, aftbeam	10-3 ADC units
18	4	I4	Internal Calibration level monitoring factor, forebeam	10-3 ADC units
19	4	I4	Internal Calibration level monitoring factor, midbeam	10-3 ADC units
20	4	I4	Internal Calibration level monitoring factor, aftbeam	10-3 ADC units
21	2	B	Mode of operation - set by the first midbeam source packet contributing to spatial filtering for the first node (near swath) in the center row of a product. bit 1 and 2: 0: windmode 1: wind/wave mode 2: no data found to identify mode bit 3 - 16: Spare	N/A
22-71	82	I2	Parameter Table ID. Details as follows:	N/A
22	2	I2	Global threshold Parameter Table ID	N/A
23	2	I2	Static parameter Parameter Table ID	N/A
24	2	I2	Dynamic parameter Parameter Table ID	N/A
25	2	I2	F Rb(n) Parameter Table ID	N/A
26	2	I2	Torbit,ref,D Parameter Table ID	N/A
27	2	I2	*F Parameter Table ID	N/A
28	2	I2	*M Parameter Table ID	N/A
29	2	I2	*A Parameter Table ID	N/A
30	2	I2	F Tb(n) Parameter Table ID	N/A
31	2	I2	CADC,b(n) Parameter Table ID	N/A
32	2	I2	Torbit,ref,N Parameter Table ID	N/A
33	2	I2	FN,F Parameter Table ID	N/A
34	2	I2	FN,M Parameter Table ID	N/A
35	2	I2	FN,F Parameter Table ID	N/A
36	2	I2	*N,b(j,k) Parameter Table ID	N/A
37	2	I2	*N,b(j,k) Parameter Table ID	N/A
38	2	I2	Meff,b(j,k) Parameter Table ID	N/A
39	2	I2	N(j,k) Parameter Table ID	N/A
40	2	I2	Wind extraction software configuration Table ID	N/A
41	2	I2	LAb(ir,ic) Parameter Table ID	N/A
42	2	I2	LZb(ir,ic) Parameter Table ID	N/A
43	2	I2	LNb Parameter Table ID	N/A
44	2	I2	MAb Parameter Table ID	N/A
45	2	I2	MSb Parameter Table ID	N/A
46	2	I2	NAF(*,ic) fore Parameter Table ID	N/A
47	2	I2	NAM(*,ic) mid Parameter Table ID	N/A
48	2	I2	NAA(*,ic) aft Parameter Table ID	N/A
49	2	I2	NSF(*,ic) fore Parameter Table ID	N/A
50	2	I2	NSM(*,ic) mid Parameter Table ID	N/A
51	2	I2	NSA(*,ic) aft Parameter Table ID	N/A
52	2	I2	NNF(*,ic) fore Parameter Table ID	N/A
53	2	I2	NNM(*,ic) mid Parameter Table ID	N/A
54	2	I2	NNA(*,ic) aft Parameter Table ID	N/A
55	2	I2	lref Parameter Table ID	N/A
56	2	I2	aF(* ,ic) fore Parameter Table ID	N/A
57	2	I2	aM(* ,ic) mid Parameter Table ID	N/A
58	2	I2	aA(* ,ic) aft Parameter Table ID	N/A
59	2	I2	avF(k,ir,ic) fore Param. Table ID	N/A
60	2	I2	avM(k,ir,ic) mid Parameter Table ID	N/A
61	2	I2	avA(k,ir,ic) aft Parameter Table ID	N/A
62	2	I2	ib Parameter Table ID	N/A
63	2	I2	Spare	N/A
64	2	I2	Spare	N/A
65	2	I2	Meteo Table ID (table type 83, Forecast F18)	N/A
66	2	I2	Meteo Table ID (table type 84, Forecast F24)	N/A
67	2	I2	Meteo Table ID (table type 85, Forecast F30)	N/A
68	2	I2	Meteo Table ID (table type 86, Forecast F36)	N/A
69	2	I2	Spare	N/A
70	2	I2	Spare	N/A
71	2	I2	Spare	N/A

Data Set Header for User Wind Product (UWI)
Field	Bytes	Type	Description	Units
1	4	I4	Data record number, starting with 1.	Count
2	4	I4	Geodetic latitude of Node. A negative value denotes South latitude, and a positive value denotes North latitude.	10-3 deg
3	4	I4	East longitude (i.e. 0-360* from Greenwich to east)	10-3 deg
4	4	I4	s º of forebeam	10-7 dB
5	2	I2	Incidence Angle for forebeam	0.1 deg
6	2	I2	Look Angle of forebeam clock- wise w.r.t. North at grid point	0.1 deg
7	1	I1	Kp Value of forebeam, set to 255 if the calculation is not possible (*).	%
8	1	I1	Counter of forebeam corrupted or missing source packets	Count
9	4	I4	s º of midbeam	10-7 dB
10	2	I2	Incidence Angle of midbeam	0.1 deg
11	2	I2	Look Angle of midbeam clock- wise w.r.t. North at grid point .	0.1 deg
12	1	I1	Kp Value of midbeam, set to 255 if the calculation is not possible (*).	%
13	1	I1	Counter of midbeam corrupted or missing source packets	Count
14	4	I4	s º of aftbeam	10-7 dB
15	2	I2	Incidence Angle of aftbeam	0.1 deg
16	2	I2	Look Angle of aftbeam clock- wise w.r.t. North at grid point.	0.1 deg
17	1	I1	Kp Value of aftbeam, set to 255 if the calculation is not possible (*).	%
18	1	I1	Counter of aftbeam corrupted or missing source packets	Count
19	1	I1	Wind speed (set to 0 if wind extraction is not possible)	0.5 m/s
20	1	I1	Wind direction with respect to North turning clockwise at grid point (set to 255 if wind extraction is not possible)	2 deg.
21	2	B	Product Confidence Data bit 1 Summary PCD factor 0: processing of cell according to full specification 1: result to be viewed with limitation, i.e. one of the PCD flags listed below is not 0 (except bits 11-13). bit 2 Forebeam Flag 0: beam OK 1: no forebeam calculation bit 3 Midbeam Flag 0: beam OK 1: no midbeam calculation bit 4 Aftbeam Flag 0: beam OK 1: no aftbeam calculation bit 5 Forebeam Arcing Flag 0: no arcing detected on forebeam 1: arcing detected on forebeam bit 6 Midbeam Arcing Flag 0: no arcing detected on midbeam 1: arcing detected on midbeam bit 7 Aftbeam Arcing Flag 0: no arcing detected on aftbeam 1: arcing detected on aftbeam bit 8 Limit of Kp value 0: all beams below MMCC/EECF-supplied threshold 1: any beam above or equal to MMCC/EECF-supplied threshold bit 9 Land-Sea Flag 0: Sea 1: Land bit 10 Rank one solution flag . 0: Ambiguity removed 1: No ambiguity removal performed or ambiguity removal not successful See Note 6. bit 11-12 Ambiguity Removal Method . 0: ambiguity removed autonomously 1: use of meteorological tables after failure of autonomous ambiguity removal 2: ambiguity removed using meteorological data only 3: no ambiguity removal attempted bit 13 Maximum likelihood distance flag . 0: Maximum Likelihood Distance M of the rank 1 solution is less than or equal to a threshold 1: Maximum Likelihood Distance M of the rank 1 solution (i.e. solution of minimum residual) is greater than a threshold (see note 9). bit 14 Frame Checksum Flag 0: Checksum correct 1: Checksum error detected, noise and calibration replaced with default bit 15 and 16 Spare	N/A

(*) with software version greater or equal to 8310, the Kp is in 'per thousands' .

Reference

"ERS Ground Stations Products specification", ER-IS-EPO-GS-0201, issue 3/1. Some fields of the original document have been modified.

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UWI data format description.

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Last modified: 21-Jan-2005

Main Product header Detailed Description

Specific Product Header for User Wind Product (UWI)

Data Set Header for User Wind Product (UWI)