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Measured Ionosphere Delay Correction for Code-Based GPS Time Transfer

Published

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

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 May 23, 2024)

Issues

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Created December 4, 2014, Updated February 19, 2017