An Integer Ambiguity Resolution Method for GPS Attitude Determination

GPS를 이용한 자세 측정 시스템의 미지정수 결정기법

  • 박찬식 (충북대학교 전기전자공학부) ;
  • 김일선 (삼성전자 멀티미디어 연구소)
  • Published : 1999.01.01

Abstract

The attitude of a vehicle can be precisely determined using GPS carrier phase measurements from more than two antennas attached to a vehicle and an efficient integer ambiguity resolution technique. Many methods utilizing the known baseline length as a constraint of independent elements of integer ambiguities are proposed to resolve integer ambiguity at real time. Three-dimensional search space is reduced to two-dimensional search space with this constraint. Thus the true integer ambiguity can be easily determined with less computational burden and fewer number of measurements. But there are still strong requirements for the real time integer ambiguity resolution, which uses single epoch measurement of long baseline. In this paper, a new constraint from the geometry of multiple baselines is derived. With this new constraint, two-dimensional search space is further reduced to one-dimensional search space. It makes possible to determine integer ambiguity with single epoch measurement. The proposed method is applied to real data to show its effectiveness.

Keywords

References

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