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Total ionospheric electron content calibration using SERIES GPS satellite dataThe current status of the Deep Space Network advanced systems research into ionospheric calibration techniques, based on Global Positioning System (GPS) data is described. A GPS-based calibration system is planned to replace the currently used Faraday rotation method by 1989. The SERIES receiver system determines the differential group delay of signals transmitted at two different carrier frequencies. This differential delay includes an ionospheric component and a GPS transmitter offset. The transmitter offsets are different for each GPS satellite. Tests were conducted to assess the effect of the offsets on the ionospheric calibration accuracy. From the obtained data, the total electron content and GPS transmitter offsets are calculated by a least squares estimation method employing a local model of total ionospheric electron content. The end product is an estimation of the total ionospheric content for an arbitrary line-of-sight direction. For the presented polynomial fitting technique, the systematic error due to mismodeling is estimated to be approximately 6 x 10 to the 16th power el/sq m, while the formal error is approximately 2 x 10 to the 16th power el/sq m. The final goal is an error of 3 x 10 to the 16th power el/sq m (approximately 0.7 ns at 2.3 GHz).
Document ID
19860018804
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lanyi, G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
May 15, 1986
Publication Information
Publication: The Telecommunications and Data Acquisition Report
Subject Category
Geophysics
Accession Number
86N28276
Funding Number(s)
PROJECT: RTOP 310-10-60-07-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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