3 LEADER FILE
File Descriptor Record Fixed Segment
TABLE 3.1 SARLEADER FILE - FILE DESCRIPTOR RECORD
(FIXED SEGMENT) DEFINITION
FIELD BYTES FORMAT DESCRIPTION AND/OR CONTENT 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 (512)
7 13-14 A2 ASCII/EBCDIC flag $A
8 15-16 A2 blanks $$
9 17-28 A12 Format control document ID for this data file format CEOS-SAR-CCT
10 29-30 A2 Format control document revision level $A
11 31-32 A2 File design descriptor revision letter $A
12 33-44 A12 Generating software release and revision level <.....>
13 45-48 I4 File number $$$1
14 49-64 A16 File name ERS1.SAR.FDCLEAD
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 Al Reserved <$...$>.
25 114 Al Reserved <$...$>
26 115 Al Reserved <$...$>.
27 116 Al Reserved <$...$>
28 117-180 A64 Reserved segment <$...$>.
File Descriptor Record Variable Segment
TABLE 3.2 SARLEADER FILE - FILE DESCRIPTOR RECORD
VARIABLE SEGMENT
FIELD BYTES FORMAT DESCRIPTION CONTENT
29 181-186 I6 Number of data set summary records $$$$$0
30 187-192 I6 Data set summary record length $$$$$0
31 193-198 I6 Number of map projection data records $$$$$0
32 199-204 I6 Map projection record length $$$$$0
33 205-210 I6 Number of platform pos. data records $$$$$0
34 211-216 I6 Platform position record length $$$$$0
35 217-222 I6 Number of attitude data records $$$$$0
36 223-228 I6 Attitude data record length $$$$$0
37 229-234 I6 Number of radiometric data records $$$$$0
38 235-240 I6 Radiometric record length $$$$$0
39 241-246 I6 Number of rad. compensation records $$$$$0
40 247-252 I6 Radiometric compensation rec. length $$$$$0
41 253-258 I6 Number of data quality summary records $$$$$0
42 259-264 I6 Data quality summary record length $$$$$0
43 265-270 I6 Number of data histograms records $$$$$0
44 271-276 I6 Data histogram record length $$$$$0
45 277-282 I6 Number of range spectra records $$$$$0
46 283-288 I6 Range spectra record length $$$$$0
47 289-294 I6 Number of DEM descriptor records $$$$$0
48 295-300 I6 DEM descriptor record length $$$$$0
49 301-306 I6 Number of Radar par. update records $$$$$0
50 307-312 I6 Radar par. update record length $$$$$0
51 313-318 I6 Number of Annotation data records $$$$$0
52 319-324 I6 Annotation data record length $$$$$0
53 325-330 I6 Number of Det.processing records $$$$$0
54 331-336 I6 Det.processing record length $$$$$0
55 337-342 I6 Number of Calibration records $$$$$0
56 343-348 I6 Calibration record length $$$$$0
57 349-354 I6 Number of GCP records $$$$$0
58 355-360 I6 GCP record length $$$$$0
59 361-366 I6 spare $$$$$$
60 367-372 I6 spare $$$$$$
61 373-378 I6 spare $$$$$$
62 379-384 I6 spare $$$$$$
63 385-390 I6 spare $$$$$$
64 391-396 I6 spare $$$$$$
65 397-402 I6 spare $$$$$$
66 403-408 I6 spare $$$$$$
67 409-414 I6 spare $$$$$$
68 415-420 I6 spare $$$$$$
69 421-426 I6 Number of Facility data records $$$$$2
70 427-432 I6 Facility data record length $12288
71 433-512 A80 blanks <$...$>
File Descriptor Record Variable Segment
TABLE 3.2 SARLEADER FILE - FILE DESCRIPTOR RECORD
VARIABLE SEGMENT
FIELD BYTES FORMAT DESCRIPTION CONTENT
29 181-186 I6 Number of data set summary records $$$$$0
30 187-192 I6 Data set summary record length $$$$$0
31 193-198 I6 Number of map projection data records $$$$$0
32 199-204 I6 Map projection record length $$$$$0
33 205-210 I6 Number of platform pos. data records $$$$$0
34 211-216 I6 Platform position record length $$$$$0
35 217-222 I6 Number of attitude data records $$$$$0
36 223-228 I6 Attitude data record length $$$$$0
37 229-234 I6 Number of radiometric data records $$$$$0
38 235-240 I6 Radiometric record length $$$$$0
39 241-246 I6 Number of rad. compensation records $$$$$0
40 247-252 I6 Radiometric compensation rec. length $$$$$0
41 253-258 I6 Number of data quality summary records $$$$$0
42 259-264 I6 Data quality summary record length $$$$$0
43 265-270 I6 Number of data histograms records $$$$$0
44 271-276 I6 Data histogram record length $$$$$0
45 277-282 I6 Number of range spectra records $$$$$0
46 283-288 I6 Range spectra record length $$$$$0
47 289-294 I6 Number of DEM descriptor records $$$$$0
48 295-300 I6 DEM descriptor record length $$$$$0
49 301-306 I6 Number of Radar par. update records $$$$$0
50 307-312 I6 Radar par. update record length $$$$$0
51 313-318 I6 Number of Annotation data records $$$$$0
52 319-324 I6 Annotation data record length $$$$$0
53 325-330 I6 Number of Det.processing records $$$$$0
54 331-336 I6 Det.processing record length $$$$$0
55 337-342 I6 Number of Calibration records $$$$$0
56 343-348 I6 Calibration record length $$$$$0
57 349-354 I6 Number of GCP records $$$$$0
58 355-360 I6 GCP record length $$$$$0
59 361-366 I6 spare $$$$$$
60 367-372 I6 spare $$$$$$
61 373-378 I6 spare $$$$$$
62 379-384 I6 spare $$$$$$
63 385-390 I6 spare $$$$$$
64 391-396 I6 spare $$$$$$
65 397-402 I6 spare $$$$$$
66 403-408 I6 spare $$$$$$
67 409-414 I6 spare $$$$$$
68 415-420 I6 spare $$$$$$
69 421-426 I6 Number of Facility data records $$$$$2
70 427-432 I6 Facility data record length $12288
71 433-512 A80 blanks <$...$>
Facility Related Data Record MPH-SPH type(2)
TABLE 3.3 FACILITY DATA RECORD MPH TYPE DEFINITION (Cont'ed)
FIELD BYTES FORMAT DESCRIPTION
37 474-485 I12 Sum of number of calibration sub-system
and receiver gain changes
38 486-497 I12 Number of missing lines
39 498-509 I12 Spare
40 510-521 I12 3-dB pulse width of chirp replica
cross-correlation pixels function
41 522-533 I12 First side lobe level of point chirp replica
cross-correlation function
42 534-545 I12 ISLR of chirp replica cross-correlation function
43 546-557 I12 Doppler centroid confidence measure.
44 558-569 I12 Doppler ambiguity confidence measure.
45 570-581 I12 Mean of I input data
46 582-593 I12 Mean of Q input data
47 594-605 I12 Standard Deviation of I input data
48 606-617 I12 Standard Deviation of Q input data
49 618-629 I12 Geodetic latitude of the first pixel of the
first line of the scene product.
50 630-641 I12 East longitude of the first pixel of the first
of the first line of the scene product
51 642-653 I12 Geodetic latitude of the last pixel of the first
line of the scene product
52 654-665 I12 East longitude of the last pixel of the first
pixel of the first line of the scene product
53 666-677 I12 Geodetic latitude of the last pixel of the last
line of the scene product
54 678-689 I12 East longitude of the last pixel of the last
line of the scene product
55 690-701 I12 Geodetic latitude of the first pixel of the last
line of the scene product
56 702-713 I12 East longitude of the first pixel of the last
line of the scene product
57 714-725 I12 Geodetic latitude of the centre pixel of the scene product
58 726-737 I12 East longitude of the centre pixel of the scene product
59 738-749 I12 Origin of used chirp
60 750-761 I12 Chirp extraction index
61 762-773 I12 Chirp amplitude coefficient-constant
62 774-785 I12 Chirp amplitude coefficient-linear
63 786-797 I12 Chirp amplitude coefficient-quadratic
64 798-809 I12 Chirp amplitude coefficient-cubic
65 810-821 I12 Chirp amplitude coefficient-quartic
Facility Related Data Record MPH-SPH type(3)
TABLE 3.3 FACILITY DATA RECORD MPH TYPE DEFINITION (Cont'ed)
FIELD BYTES FORMAT DESCRIPTION
66 822-833 I12 Chirp phase coefficient-constant
67 834-845 I12 Chirp phase coefficient-linear
68 846-857 I12 Chirp phase coefficient-quadratic
69 858-869 I12 Chirp phase coefficient-cubic
70 870-881 I12 I mean for raw data correction
71 882-893 I12 Q mean for raw data correction
72 894-905 I12 I/Q Std Ratio for raw data correction
73 906-917 I12 Output pixel bit length
74 918-929 I12 16- to 8-bit conversion coefficient-constant
75 930-941 I12 16- to 8-bit conversion coefficient-linear
76 942-953 I12 16- to 8-bit conversion coefficient-quadratic
77 954-965 I12 Calibration System Gain
78 966-977 I12 Receiver Gain
79 978-989 I12 Clutter noise estimate
80 990-1001 I12 Spare
81 1002-1013 I12 Range pixel spacing
82 1014-1025 I12 Azimuth pixel spacing
83 1026-1037 I12 Pulse Repetition Frequency
84 1038-1049 I12 2-way slant range time of the first processed range cell
85 1050-1061 I12 Doppler centroid value at near range
86 1062-1073 I12 Slope of Doppler centroid over 2-way slant range time
87 1074-1085 I12 Azimuth FM rate at near range
88 1086-1097 I12 Slope of azimuth FM rate over 2-way slant range time
89 1098-1109 I12 Doppler ambiguity number
90 1110-1121 I12 Calibration coefficient (antenna) constant term
91 1122-1133 I12 Calibration coefficient (antenna) linear term
92 1134-1145 I12 Calibration coefficient (antenna) quadratic term
93 1146-1157 I12 Calibration coefficient (antenna) spare term
94 1158-1169 I12 Calibration coefficient (antenna) spare term
95 1170-1181 I12 EXT_SAR parameter table identifier
96 1182-1193 I12 Datation inprovement
97 1194-1205 I12 SARFDP Static Transfer Function Table identifier
98 1206-1217 I12 SARFDP Parameter Database identifier
99 1218-1229 I12 output image mean
100 1230-1241 I12 output image standard deviation
101 1242-1253 I12 Range compression scalar gain
102 1254-1265 I12 Azimuth FFT scalar gain
103 1266-1277 I12 Azimuth compression scalar gain
104 1278-1289 I12 Overall processing gain
105 1290-2048 A759 Spare Blanks
Facility Related Data Record PCS Type
TABLE 3.4 FACILITY RELATED DATA RECORD PCS QUALITY TYPE DEFINITION
FIELD BYTES FORMAT DESCRIPTION
1 1-4 B4 Sequence number (n)
2 5 Bl 1-st record sub-type code (10)
3 6 Bl Record type code (200)
4 7 Bl 2-nd record sub-type code (31)
5 8 Bl 3-rd record sub-type code (50)
6 9-12 B4 Length of this record (12288)
7 13-76 A64 name of this facility related data record "FACILITY"
"$RELATED DATA RECORD PCS QUALITY TYPE$...$"
8 77-12288 B reserved