×

System and method for high-integrity detection and correction of cycle slip in a carrier phase-related system

  • US 6,166,683 A
  • Filed: 02/19/1998
  • Issued: 12/26/2000
  • Est. Priority Date: 02/19/1998
  • Status: Expired due to Term
First Claim
Patent Images

1. In an attitude determination system having a plurality of satellites and having first and second antennas, a method of detecting and correcting cycle slip in said system comprising:

  • at a first processing epoch,measuring a first phase of a first carrier signal at said first antenna from a first satellite,measuring a second phase of said first carrier signal at said second antenna from said first satellite, andestablishing a first single difference from said first and second phases;

    at a second processing epoch,measuring a third phase of said first carrier signal at said first antenna from said first satellite,measuring a fourth phase of said first carrier signal at said second antenna from said first satellite, andestablishing a second single difference from said third and fourth phases;

    establishing a delta single difference from said first and second single differences;

    establishing a detection test statistic from said delta single differences;

    establishing a failure detection threshold using a geometry of said plurality of satellites and a false alert rate;

    comparing the detection test statistic to the failure detection threshold; and

    declaring existence of a cycle slip based on said comparing further comprising;

    at said first processing epoch,measuring a first phase of a second carrier signal at said first antenna from a second satellite,measuring a second phase of said second carrier signal at said second antenna from said second satellite; and

    at said second processing epoch,measuring a third phase of said second carrier signal at said first antenna from said second satellite,measuring a fourth phase of said second carrier signal at said second antenna from said second satellite,wherein said establishing a first single difference is established from said first and second phases of said first carrier signal and said first and second phases of said second carrier signal, andwherein said establishing a second single difference is established from said third and fourth phases of said first carrier signal and said third and fourth phases of said second carrier signal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×