TABLE 4.1 SAR DATA FILE - FILE DESCRIPTOR RECORD (FIXED SEGMENT)
FIELD BYTES FORMAT DESCRIPTION CONTENT 1 1-4 B4 Record sequence number (1) 2 5 B1 l-st record sub-type code (63) 3 6 B1 Record type code (192) 4 7 B1 2-nd record sub-type code (18) 5 8 B1 3-rd record sub-type code (18) 6 9-12 B4 Length of this record (11644) 7 13-14 A2 ASCII/EBCDIC flag A$ 8 15-16 A2 blanks $$ 9 17-28 A12 Format control document ID for this data file format CEOS-SAR-CCT 10 29-30 A2 Format control document revision level $B 11 31-32 A2 File design descriptor revision letter $B 12 33-44 A12 Generating software release and revision level <......> 13 45-48 I4 File number $$$2 14 49-64 A16 File name ERS1.SAR.RAWIMGY 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 24 113 B1 Reserved <$....$> 25 114 B1 Reserved <$....$> 26 115 B1 Reserved <$....$> 27 116 B1 Reserved <$....$> 28 117-180 A64 Reserved segment <$....$>
TABLE 4.2 SAR DATA IMAGERY OPTIONS FILE DESCRIPTOR RECORD (VARIABLE SEGMENT)
FIELD BYTES FORMAT DESCRIPTION CONTENT
29 181-186 I6 Number of SAR DATA records (nominal) $27000
30 187-192 I6 SAR DATA record length (bytes) $11644
31 193-216 A24 Reserved (blanks) <$....$>
SAMPLE GROUP DATA
32 217-220 I4 Number of bits per sample $$16
33 221-224 I4 Number of samples per data group (or pixels) $$$1
34 225-228 I4 Number of bytes per data group (or pixel) $$$2
35 229-232 A4 Justification and order of samples within data group
SAR RELATED DATA IN THE RECORD
36 233-236 I4 Number of SAR channels in this file $$$1
37 237-244 I8 Number of lines per data set (nominal) <......>
38 245-248 I4 Number of left border pixels per line $$$0
39 249-256 I8 Total number of data groups per line per SAR channel $$$$5616
40 257-260 I4 Number of right border pixels per line $$$0
41 261-264 I4 Number of top border 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 $$
46 277-280 I4 Number of bytes of prefix data per record $400
47 281-288 I8 Number of bytes of SAR data (or pixel data) per record $$$11232
(nominal)
48 289-292 I4 Number of bytes of suffix data per record $$$0
49-55 293-340 A48 reserved <$....$>
56 341-368 A28 blanks <$....$>
57-60 369-400 A32 reserved <$....$>
61 401-428 A28 SAR Data format type identifier COMPLEX SIGNED$INTEGER$..$
62 429-432 A4 SAR Data format type code CIS2
63 433-436 I4 Number of left fill bits within pixel $$$0
64 437-440 I4 Number of right fill bits within pixel $$$0
65 441-448 I8 Maximum data range of pixel $$$$$255
(max-min value for I and Q)
66 449-11644 A10196 spare <$....$>
TABLE 4.3 IMAGERY OPTIONS FILE - SIGNAL DATA RECORD DEFINITION
FIELD BYTES FORMAT DESCRIPTION CONTENT
1 1-4 B4 Record sequence number (n)
2 5 B1 1-st record sub-type code 50
3 6 B1 Record type code 10
4 7 B1 2-nd record sub-type code 18
5 8 B1 3-rd record sub-type code 20
6 9-12 B4 Length of this record (11644)
PREFIX DATA - GENERAL INFORMATION
7 13-16 B4 SAR image data line number (....)
8 17-20 B4 SAR image data record index (indicates the (....)
record sequence number of the image line)
9 21-24 B4 Actual count of left-fill pixels (0)
10 25-28 B4 Actual count of data pixels (samples) (5616)
11 29-32 B4 Actual count of right-fill pixels (0)
PREFIX DATA - SENSOR PARAMETERS
12-27 33-84 B52 reserved
28 85-88 B4 spare <$...$>
29 89-92 B4 spare <$...$>
30-37 93-124 B32 reserved
38 125-128 B4 spare
PREFIX DATA PLATFORM REFERENCE INFORMATION
39-50 129-192 B64
PREFIX DATA - SENSOR/FACILITY SPECIFIC, AUXILIARY DATA
51 193-412 B220 Sensor/Facility specific auxiliary information
such as down linked auxiliary data ( i.e. pulse
replicas, etc. ) and data quality information
B1 fixed code = AA in Hexadecimal notation
B1 OGRC/OBRC flag 1 or 0)
B4 ICU on board time
B2 activity task
B4 image format counter
B2 sampling window start time
B2 pulse repetition interval
B1 calibration attenuation setting
B1 receiver gain attenuation setting
130B1 spare
36B2 36 calibration pulses as
(4bit spare 6bit Q 6bit I from MSB down to LSB)
SAR RAW SIGNUL DATA
52 413-414 B2 first sample I and Q values (n)
53 415-416 B2 second sample I and Q values (n)
.. ....... B2 ...... sample I and Q values (n)
5667 11643-11644B2 last sample I and Q values (n)