Dual axis geophones for pressure/velocity sensing streamers forming a triple component streamer

A carrier configured to be provided in a streamer for acoustic marine data collection, the carrier comprising:

• a single body having first and second pairs of opposite channels;
• a first accelerometer provided at a first radial position in the first pair of opposite channels;
• a second accelerometer provided at a second radial position in the second pair of opposite channels;
• and
• a tilt sensor located in one of the first and second pairs of opposite channels and configured to determine a tilt angle of the carrier about a gravity direction,
• wherein the second pair of opposite channels has no hydrophone sensor.

A marine streamer configured to be towed by a vessel under-water for collecting seismic data, the marine streamer comprising:

• plural carriers provided along the streamer, a carrier having,
• a single body having plural channels,
• a first hydrophone provided in a first channel of the plural channels,
• a first accelerometer provided in a second channel of the plural channels,
• a second accelerometer provided in the first channel, wherein the first accelerometer is offset in a radial direction from the second accelerometer, and
• a tilt sensor attached to the single body;
• and
• a field digitizing unit configured to receive analog signals from the first hydrophone and generate a corresponding digital signal,
• wherein the tilt sensor is configured to determine a tilt angle of the carrier about a gravity direction, and
• wherein the second channel has no other hydrophone or accelerometer sensor.

A marine streamer configured to be towed under-water by a vessel for collecting seismic data, the marine streamer comprising:

• plural carriers provided along the streamer, a carrier having,
• a single body having first and second pairs of opposite channels,
• a first accelerometer and a first hydrophone provided at a first radial position in the first pair of opposite channels,
• a second accelerometer provided at a second radial position in the second pair of opposite channels, and
• a tilt sensor located in one of the first and second pairs of opposite channels and configured to determine an angle of tilt of the carrier about a gravity direction;
• and
• a field digitizing unit configured to receive analog signals from the first hydrophone and generate a corresponding digital signal,
• wherein the tilt sensor is configured to determine a tilt angle of the carrier about a gravity direction, and
• wherein the second pair of opposite channels has no hydrophone sensor.