4. DATA SET FILE FORMAT DEFINITION
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 Bl 1-st record sub-type code (63)
3 6 Bl Record type code (192)
4 7 Bl 2-nd record sub-type code (18)
5 8 Bl 3-rd record sub-type code (18)
6 9-12 B4 Length of this record (10012)
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.SLCIMGY
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 A1 Reserved <$....$>
25 114 Al Reserved <$....$>
26 115 Al Reserved <$....$>
27 116 Al Reserved <$....$>
28 117-180 A64 Reserved segment <$....$>
TABLE 4.2 SAR DATA IMAGERY OPTIONS FILE FILE DESCRIPTOR RECORD VARIABLE SEGMENT
FIELD BYTES FORMAT DESCRIPTION CONTENT
29 181-186 I6 Number of SAR DATA records (nominal) $15000
30 187-192 I6 SAR DATA record length (bytes) $10012
31 193-216 A24 Reserved (blanks) <$....$>
SAMPLE GROUP DATA
32 217-220 I4 Number of bits per sample $$32
33 221-224 I4 Number of samples per data group (or pixels) $$$1
34 225-228 I4 Number of bytes per data group (or pixel) $$$4
35 229-232 A4 Justification and order of samples within data group <$....$>
SAR RELATED DATA IN THE RECORD
36 233-236 I4 Number of SAR channels in this file $$$1
37 237-244 I8 Number of lines per data set (minimum) $$$15000
38 245-248 I4 Number of left border pixels per line $$$0
39 249-256 I8 Total number of data groups per line per SAR channel $$$$2500
40 257-260 I4 Number of right border pixels per line $$$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 $$
46 277-280 I4 Number of bytes of prefix data per record $$$0
47 281-288 I8 Number of bytes of SAR data (or pixel data) $$$10000
per record (nominal)
48 289-292 I4 Number of bytes of suffix data per record $$$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$INTEGER$..$
62 429-432 A4 SAR Data format type code CI*4
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 $$$65535
66 449-EOR A15564 spare <$....$>
DATA RECORD
TABLE 5.1 IMAGERY OPTIONS FILE - PROCESSED DATA RECORD
FIELD BYTES FORMAT DESCRIPTION CONTENT
1 1-4 B4 Record sequence number (n)
2 5 Bl 1-st record sub-type code (50)
3 6 Bl Record type code (11)
4 7 Bl 2-nd record sub-type code (31)
5 8 Bl 3-rd record sub-type code (20)
6 9-12 B4 Length of this record (nominal) (10012)
7 13-16 C4 first sample of image line (n)
8 17-20 C4 second sample of image line (n)
. ..... .. ............................ ..........
5006 10009-10012 C4 last sample of image line (n)