| MGL1109 Chirp - US Extended Continental Shelf Project: Gulf of Alaska CHIRP High-Resolution
Seismic Profile Data |
| The Knudsen 2620 acquired sub-bottom profiles continuously throughout the cruise.
The Knudsen was operated in 3.5 kHz Chirp mode, emitting a 1.5 kHz to 5 kHz (3 kHz
bandwidth centered on 3.5 kHz) pulse from transducers mounted in the pod beneath the
hull. A record window of 200 meters and assumed sound velocity of 1500 m/s remained
constant through the cruise. The resulting data records were 267 msec long, with a
sample interval 0.16667 msec (6 kHz). The ping rate varied over the course of the
cruise. For most of the first two weeks, the ping rate was approximately 5 seconds.
On or about June 23, the ping rate was increased to approximately 2 seconds. |
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