| MARINE SURVEY GENERAL INFORMATION |
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| GENERAL |
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Voyage No. : |
YK02-04 |
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JAMSTEC
/ others: |
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| AREA |
Puna ridge |
LINE No. |
Line9-4 |
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| FIRST SP No. |
1 |
LAST SP No. |
118 |
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| DATE/TIME |
15:08:40 07/18/2002 |
DATE/TIME |
15:47:50 07/18/2002 |
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| WEATHER |
Fine but Cloudy |
WEATHER |
Fine but Cloudy |
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| SEA CONDITION |
Sea rough |
SEA CONDITION |
Sea rough |
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| Latitude |
19°29.4469 |
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Latitude |
19°26.2344 |
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| Longitude |
154°28.9582 |
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Longitude |
154°28.4524 |
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| SEA DEPTH |
4773 |
m |
SEA DEPTH |
5110 |
m |
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| SOG |
3.9 |
knt |
SOG |
5 |
knt |
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| Wind Lebel |
Strong breeze |
Wind Lebel |
Strong breeze |
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| S.P. INTERVAL |
20 |
sec |
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7.3～8.6 |
m |
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| CABLE DEPTH |
8.6～9.8 |
m |
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| SOURCE |
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| GUN TYPE |
GI-GUN (Seismic systems, inc.) |
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| VOLUME |
350×1 |
cu.in |
([G]245cu.in, [ I ] 105cu.in) |
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| AIR PRESSURE |
1700 |
psi |
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11.724 |
Mpa) |
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| GI DELAY TIME |
35.0 |
msec |
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| RECORDING |
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| SAMPLE FREQENCY |
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1000 |
Hz |
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| RECORD LENGTH |
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12000 |
msec |
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| WATER
DELAY |
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0 |
msec |
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| Processing (SPW) |
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| ①SDC |
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| ②Bandpass |
Lo cut (Hz) |
Lo pass (Hz) |
Hi pass (Hz) |
Hi cut (Hz) |
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20 |
30 |
200 |
250 |
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| ③AGC |
Top window length (msec) |
Bottom window length |
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200 |
1000 |
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| STREAMER |
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| ACTIVE STREAMER |
65 |
m |
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| HYDROPHONE TYPE |
SIG 16 |
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| SENSITIVITY |
-90db, re1V/μ bar, ±1db |
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| No. of HYDROPHONE GROUP |
48 |
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| FRONT STRETCH
SECTION |
135 |
m |
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| FILE NAME |
Line9-4 |
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| REMARKS |
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R/V YOKOSUKA |
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