Page 144 - Acquisition and Processing of Marine Seismic Data

2.6 QC IN DATA ACQUISITION 135

☑
Parameter Planned Configured
Low cut filter 3 Hz/18 dB 3 Hz/18 dB □
High cut filter 200 Hz/210 dB 200 Hz/210 dB □
Auxiliary channels 60 60 □
Sources Number of sources 2 2 □
Total gun volume per source 3090 in 3 3090 in 3 □
Number of subarrays 3 3 □
Number of guns per subarray 8 8 □
Number of hydrophones per subarray 8 8 □
Number of depth transducers per subarray 4 4 □
Number of pressure sensors per subarray 1 1 □
Source depth 6 m 6 m □
Source separation 50 m 50 m □
Nominal air pressure 2000 psi 2000 psi □
Verifications
Checking of recording system/streamer telemetry □
Performing a full recording system/streamer test □
Checking of trace polarity □
Checking of near-field hydrophones (tap test) □
Checking of string depth ropes □
Checking of string depth sensors □
Checking of birds/acoustics communications during and after deployment □
Checking of bird depth sensors before deployment □
Checking of acoustic network and offsets □
Checking of data gain □
Checking of echosounder velocity □
Checking of DGPS/rGPS systems □
Performing a test line □
Checking of external SegD data header after test line □
Performing bubble period tests for each individual gun □
Checking of gun line integrity □