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Method and apparatus for regional gravity surveys using a GPS receiver

  • US 5,869,759 A
  • Filed: 08/23/1996
  • Issued: 02/09/1999
  • Est. Priority Date: 08/23/1996
  • Status: Expired due to Fees
First Claim
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1. Apparatus for conducting helicopter-supported gravity surveys of a survey area, comprising:

  • a gravimeter module suspended below a helicopter and adapted to be lowered to the earth'"'"'s surface for generating gravimeter readings, said gravimeter module including an automatic reading gravimeter sensor and means for self-levelling said sensor;

    a ground contact sensor for determining when said gravimeter module contacts the earth'"'"'s surface as a result of being lowered thereto, and in response generating a time marker indicative thereof;

    a GPS receiver mounted in fixed relationship to said helicopter for generating periodic position coordinates; and

    a system for receiving and recording said gravimeter readings, said periodic position coordinates and said time marker on a common time base.

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