Measured Ionosphere Delay Correction for Code-Based GPS Time Transfer

Published

December 4, 2014

Author(s)

Victor S. Zhang, Zhiqi Li

Abstract

Nowadays, more and more dual-frequency, multichannel receivers are used in GPS time and frequency transfer applications. Instead of using the modeled ionosphere delay correction or using the IGS ionospheric map, we can obtain the ionosphere delay corrections from the receivers' dual-frequency measurements. For the time and frequency transfer based on the pseudo-range measurements (code-based GPS time and frequency transfer), the CGGTTS format data are used for remote clock comparisons. All of the delays in measuring the difference between a local clock and GPS time have to be calibrated for time transfer applications. If the receiver delay for the dual-frequency measurements is not calibrated or the delays are changed, the measured ionosphere delay corrections will introduce error in the time transfer results. In this paper, we study the measured ionosphere delay correction for the code-based GPS time transfer.

Proceedings Title

Proceedings of the Institute Of Navigation (ION) Precise Time and Time Interval (PTTI) meeting

Conference Dates

December 1-4, 2014

Conference Location

Boston, MA

Conference Title

Institute Of Navigation (ION) Precise Time and Time Interval (PTTI) Meeting

Pub Type

Conferences

Download Paper

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Keywords

common-view (CV), CGGTTS data, GPS time and frequency transfer, Ionosphere delay correction, IONEX data, ionosphere-free (P3) data, receiver delay calibration

Citation

Zhang, V. and Li, Z. (2014), Measured Ionosphere Delay Correction for Code-Based GPS Time Transfer, Proceedings of the Institute Of Navigation (ION) Precise Time and Time Interval (PTTI) meeting, Boston, MA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917485 (Accessed November 8, 2024)