ACQ001 - CDP lines (Conrad only)

RC2607 was a 2-ship cruise with the R/V Thomas Washington. The line numbers assigned at sea were incorrect. Add 4 to the cruise-report line number

to get the line number used in the archived filename.

The CDP and WAP segy files are archived as cdp gathers (25 meter bins). The shot number for each trace is in bytes 9-12 of the SEG-Y trace header.

ACQ002 - Wide Aperture reflection Lines 507-515, 523-532 (WAP Lines 01-13)

RC2607 was a 2-ship cruise with the R/V Thomas Washington. The line numbers assigned at sea were incorrect. Add 4 to the cruise-report line number

to get the line number used in the archived filename.

The CDP and WAP segy files are archived as CDP gathers (25 meter bins). The shot number for each trace is in bytes 9-12 of the SEG-Y trace header.

Conrad was the lead ship, followed by Washington at about 5200 meters. The ships alternated shooting. Each ship shot once per min, one ship on the minute, the other on the half minute. Conrad recorded all shots.

The shotnav files for WAP lines include the ship to ship range (antenna to antenna)for that shot and a flag indicating which ship was shooting (1-Conrad or 2-Washington).

Antenna to Source: 48m (Conrad), 42m (Washington)

Source Depth: 3m (Conrad), 5m (Washington)

Source Number: 4 (Conrad), 4 (Washington)

Source Volume: See Cruise Report for Conrad, 2145 cu. in. for Washington

ACQ003 Expanding Spread Profile Refraction Lines 498-505,516-521,530,531 (ESP Lines 01-16). Various configurations of airguns and explosives were used for ESPs. See cruise report for details.