GByteThis table is used to estimate the number of
GBytes per day that will be generated by different cable and source seismic
acquisition configurations. For example, a vessel with dual airgun sources, 10
cables with 240 channels per cable, and 2 ms sample rate will generate 165.9
GBytes of data per day, which is then transmitted daily to the land processing
center, each day. The complete Excel spreadsheet for this model is also
available (right click this link to download
and save this file).
|
Production analysis |
low |
median |
high |
tops |
|
Expected capacity fot TDRS satellite -MbitsPS |
311 |
|
|
|
|
Expected capacity fot TDRS satellite -GbitsPD |
26,870 |
|
|
|
|
Expected capacity fot TDRS satellite
-GbytesPD |
3,359 |
|
|
|
|
# cables |
4 |
10 |
16 |
20 |
|
# channels/cable |
240 |
240 |
324 |
480 |
|
listen time/shot record (sec.) |
8 |
8 |
8 |
8 |
|
sample rate (sec./sample) |
0.002 |
0.002 |
0.002 |
0.002 |
|
# guns |
2 |
2 |
2 |
2 |
|
minimum air compressor cycle time per gun array
(sec.) |
20.0 |
20.0 |
20.0 |
20.0 |
|
meters between rcvr groups (m) |
25.0 |
25.0 |
25.0 |
25.0 |
|
crossline meters between cables (m) |
50.0 |
50.0 |
25.0 |
25.0 |
|
work hours/day (hrs) |
12.0 |
12.0 |
12.0 |
12.0 |
|
distance between consecutive shots, each gun
(m) |
50.0 |
50.0 |
50.0 |
50.0 |
|
inline traces per inline bin |
60 |
60 |
81 |
120 |
|
traces per bin |
60 |
60 |
81 |
120 |
|
sec/shot for each gun array |
20 |
20 |
20 |
20 |
|
Cable length - km |
6 |
6 |
8.1 |
12 |
|
boat speed (m/sec) |
2.5 |
2.5 |
2.5 |
2.5 |
|
boat speed (km/hr) |
9.0 |
9.0 |
9.0 |
9.0 |
|
boat speed (knots) |
4.9 |
4.9 |
4.9 |
4.9 |
|
inline bin dimen. (m) |
12.5 |
12.5 |
12.5 |
12.5 |
|
x-line bin dim. (m) |
25 |
25 |
12.5 |
12.5 |
|
total shots/hour for each gun array |
180 |
180 |
180 |
180 |
|
32 bit samples for each shot (million
samples/shot) |
3.8 |
9.6 |
20.7 |
38.4 |
|
bits for each shot (millions) |
123 |
307 |
664 |
1,229 |
|
32 bit samples per day-all shots, all guns
(billions) |
16.6 |
41.5 |
89.6 |
165.9 |
|
8 bit bytes per day (billions or
GbytesPD) |
66.4 |
165.9 |
358.3 |
663.6 |
|
avg 32 bit samples per sec during 24 hr
day(billions) |
0.111 |
0.276 |
0.597 |
1.106 |
|
avg # bits per sec during 24 hr day
(billions) |
3.5 |
8.8 |
19.1 |
35.4 |
|
boat distance per day - km |
216 |
216 |
216 |
216 |
|
boat production per day -km |
108 |
108 |
108 |
108 |
|
line coverage per day -km |
864 |
2160 |
3456 |
4320 |
|
sq km of coverage per day |
21.6 |
54 |
43.2 |
54 |
|
days to complete 2500 sq km 3-D survey |
115.74 |
46.30 |
57.87 |
46.30 |
