Apparent Diurnal Effects in the Global Positioning System
Abstract
Since the Global Positioning System (GPS) has been used for common view time and frequency transfer between remote locations various systematic effects have been observed. These effects have been discussed on various occasions appearing as biases between different daily measurements as well as obstructing closure in around-the-world time transfer. In addition we may attempt to look at GPS satellites from several locations around the world, after linking the ground station clocks using GPS. The results are that there are apparent diurnal variations in many of the SV clocks. We study these systematic effects here, the biases in common view time transfer, the lack of closure in around-the-world time transfer, and the diurnal variations in the SV clocks. We conclude that the diurnal effects are primarily due to errors in the transmitted satellite ephemeris and ionospheric model.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1987
- Accession Number
- ADA500876
Entities
People
- Matthew L. Weiss
Organizations
- National Institute of Standards and Technology