Limits on GPS Carrier-Phase Time Transfer

Abstract

The stability of differential delays between Global Navigation Satellite receivers is critical for time and frequency transfer. We study the limit of this transfer between two specific receivers due to effects in data taken from these receivers while they were connected with a splitter to the same antenna for 128 days. We show that the C/A-to-P1 TDEV stability is consistent with a flicker PM model at about 10 ps from 1 d - 10 d. The TDEV stability of differential code shows models of flicker PM at under 50 ps for C/A code, and white PM starting at under 100 ps at 1 d for P2 code. P3 code transfer would perhaps be limited by receiver variations to about 400 ps flicker PM. Carrier-only transfer shows a rate offset of +2 x 10-16 for L1 and -2 x 10-16 for L2. Thus, a carrier-only frequency transfer technique would be limited to 8 x 10-16 for the ionosphere-free combination.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2009
Accession Number
ADA518028

Entities

People

  • M. A. Weiss

Organizations

  • National Institute of Standards and Technology

Tags

DTIC Thesaurus Topics

  • Artificial Satellites
  • Clocks
  • Diurnal Variations
  • Electronic Mail
  • Frequency
  • Frequency Standards
  • Global Navigation Satellite Systems
  • Global Positioning Systems
  • Intervals
  • Navigation
  • Navigation Satellites
  • Numbers
  • Phase Modulation
  • Random Walk
  • Standards
  • Temperature Coefficients
  • Time Intervals

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.

Technology Areas

  • Space