Receiver Type: Hydrophone_Streamer
Source Type: SeismicSource_Gun_Air Bolt:1500C
Acquisition System Name: DSF IV
Acquisition System Type: digital
Seismic Nav System: US Navy Transit Satellite
Survey Datum: WGS72
Source to Near Channel: about 300m
The near trace offsets in the segy headers vary as shown. There is no explanation.
Line 1 282m for shots 225-1080
Line 1 307m for shots 1081-7096
Line 2 307m for shots 7100-7646
Line 2 279-282m for shots 9219-14736
Line 4 304-316m for shots 1-9864
Line 5 307-310m for shots 1-4768
Line 6 308-311m for shots 4895-8614
Line 7 305-318m for shots 2-2445
Antenna to Source: 40m
Number of Channels Recorded: 24
Near Channel Number: 24
Channel Length: 100m
Cable Receiver Depth (m): unknown
Source Volume (cubic inches): 1864
Source Pressure (bars): 138
Source Number: 4
Source Depth: unknown
Shot Control: Time
Shot Interval:
Lines 1,2 (every 17-20s for approximately 50m)
Lines 4,5,6,7 (every 13s for approximately 50 m)
Acquisition Interval: 2000 microseconds
Record Length: 12s
Compass Birds: no
Tail Buoy Positioning: no
Recording Delay: yes