52
72
4
float
X source coordinate (Longitude in 32-bit
float accuracy for arc seconds)
76
4
float
Y source coordinate (Latitude in 32-bit float
accuracy for arc seconds)
80
4
float
X receiver group coordinate
84
4
float
Y receiver group coordinate
88
2
short int
Coordinate units:
1 = length in meters or feets;
2 = arc seconds (DDMM.SSSS).
90
4
int
GPS signal quality
94
14
–
Unused
108
2
short int
Lag time between shot and recording start in
PICOseconds
110
4
–
Unused
114
2
short int
Number of samples in this trace
116
2
short int
Sample interval of this reel's data in
PICOseconds
118
42
–
Unused
160
2
short int
Hour of day (24 hour clock)
162
2
short int
Minute of hour
164
2
short int
Second of minute
166
2
short int
Time basis code (1 – Local, 2 - GMT)
182
8
double
Longitude in 64-bit double accuracy
190
8
double
Latitude in 64-bit double accuracy
214
2
short int
Time scalar. If positive, scalar is used as a
multiplier. If negative – divisor.
236
2
short int
Marks indicator. If equal to 0x5555, trace is
marked.
238
2
short int
Mark number.
