Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs). Each of the RAUs records seismic data derived torn one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit.

Abstract: A method for harvesting seismic data and generating seismic output files from the seismic data and corresponding source data. The method includes: positioning, in a survey area, data acquisition units associated with sensors; performing at least one seismic event using at least one seismic source; acquiring seismic data in the data acquisition units, the seismic data resulting from the at least one seismic event; deploying at least two data harvester units at fixed positions in the survey area. Each data harvester unit: harvests the seismic data; receives source data relating to the seismic event; generates a partial seismic output file from the harvested seismic data and the received source data; transmits the partial seismic output file to a central unit. The method also comprises generating, by the central unit, a final seismic output file from the partial seismic output files transmitted by the at least two data harvester units.

Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs). Each of the RAUs records seismic data derived torn one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit.

Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs) (10). Each of the RAUs (10) records seismic data derived from one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft (24) using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit (26).

Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs). Each of the RAUs records seismic data derived from one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit.

Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs). Each of the RAUs records seismic data derived from one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit.

Abstract: A seismic survey is conducted by positioning an array of remote acquisition units (RAUs) (10). Each of the RAUs (10) records seismic data derived from one or more geophones in digital form in local memory. The data is collected by a harvester unit traversed across the survey territory as by an aircraft (24) using point-multipoint communications, and subsequently transferred from the harvester unit to a central control unit (26).

Abstract: A data transmission system, particularly for use in seismic data acquisition, transmits digital signals from remote units to a central control unit via a backbone network and root nodes. Data is transmitted wirelessly between the remote units and the root nodes by means of each remote unit having two transceivers, one of which acts as a client and one as an access point. The remote units transmit metrics which enable the adaptive formation of a mesh-like network.

Abstract: A seismic system uses a plurality of remote acquisition units in each of which geophone signals in digital form are temporarily stored in a buffer for near-real-time transmission by a transmitter. The whole of the digital data is also stored in a bulk store within the acquisition unit, from which it can be retrieved and transmitted under control of signals received by a receiver. This allows a central control unit to cause lost or low quality data to be retransmitted in a flexible manner.