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GPS IIR-M L1 Transmit Power Redistribution: Analysis of GNSS Receiver and High-Gain Antenna Data

Thoelert, Steffen and Hauschild, Andre and Steigenberger, Peter and Langley, Richard (2017) GPS IIR-M L1 Transmit Power Redistribution: Analysis of GNSS Receiver and High-Gain Antenna Data. In: ION GNSS 2017. ION GNSS, 25.-29. Sep. 2017, Portland, USA.

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All seven operational GPS Block IIR-M satellites have been subject to short maintenance periods between February 7 and 8, 2017. With the help of data from several tracking stations of the International GNSS Service (IGS) and high-gain antenna measurements, it could be identified that the satellites’ transmit power of different L1 signal components has been changed during the maintenance. The analysis shows that the total radiated power of the satellites remains constant, but the power of the C/A-code and the P(Y)-code signals are increased whereas the powers of the M-code and the intermodulation product are reduced. A detailed look reveals a more efficient use of the total available power on the spacecraft through the decreased power of the intermodulation product. Thus, in sum more power is available for the three navigation signals on L1. Observations from geodetic GNSS receivers have been analyzed to demonstrate the effect of the change in L1 signal power distribution on the measured C/N0 of the C/A-code and P(Y)-code for different receiver types. High-gain antenna data collected before and after the maintenance periods are used to analyze improved utilization of the available power through the reduction of the losses caused by the intermodulation product.

Item URL in elib:https://elib.dlr.de/114691/
Document Type:Conference or Workshop Item (Speech)
Title:GPS IIR-M L1 Transmit Power Redistribution: Analysis of GNSS Receiver and High-Gain Antenna Data
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Thoelert, Steffensteffen.thoelert (at) dlr.dehttps://orcid.org/0000-0003-4653-318X
Hauschild, Andreandre.hauschild (at) dlr.dehttps://orcid.org/0000-0002-0172-3492
Steigenberger, Peterdlr/gsochttps://orcid.org/0000-0003-1905-6699
Langley, RichardunbUNSPECIFIED
Date:September 2017
Journal or Publication Title:ION GNSS 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:GPS IIR-M; Signal power; C/No; GPS L1 power redistribution
Event Title:ION GNSS
Event Location:Portland, USA
Event Type:international Conference
Event Dates:25.-29. Sep. 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Space Operations and Astronaut Training > Space Flight Technology
Deposited By: Thölert, Steffen
Deposited On:17 Oct 2017 14:21
Last Modified:31 Jul 2019 20:12

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