Groenaas

Halvor Groenaas, Oslo NO

Patent application number	Description	Published
20090296519	DETERMINING POSITIONING OF SURVEY EQUIPMENT USING A MODEL - To performing positioning of survey equipment, measurements of acoustic signals reflected from at least one boundary of a marine environment are received. The reflected acoustic signals are reflected from the at least one boundary in response to acoustic signaling originated by an acoustic source. A positioning model is updated based on the measurements of the acoustic signals, wherein the positioning model contains information relating to positions of components of a positioning system that includes the acoustic source and acoustic receiver	12-03-2009
20100002538	DETERMINING THE STRUCTURE OF A TOWED SEISMIC SPREAD ELEMENT - A technique includes obtaining a plurality of sets of measurements of distances between nodes located on a seismic spread element while the element is in tow. Each set is acquired in response to the operation of a different set of sources. The technique includes determining a three-dimensional structure of the seismic spread element while in tow based at least in part on the sets of measurements.	01-07-2010

Patent application number	Description	Published
20110116343	Positioning a Seismic Acquisition System Using Electromagnetic Signals - An apparatus includes a towed seismic acquisition system and a ranging system. The ranging system is adapted to use electromagnetic ranging signals to indicate a location of one or more points on the towed seismic acquisition system.	05-19-2011

Patent application number	Description	Published
20100067326	CETACEAN PROTECTION SYSTEM - An embodiment according to one or more aspects of the present disclosure for conducting a marine survey includes towing a survey spread comprising a plurality of receivers and an energy source along a selected course; emitting a signal from an energy source; receiving data from the plurality of receivers; detecting a cetacean from the received data; positioning the detected cetacean; limiting contact with the detected cetacean; and conducting a marine survey.	03-18-2010