NDLI: A GPS Receiver for High-Altitude Satellite Navigation

Content Provider	IEEE Xplore Digital Library
Author	Winternitz, L.M.B. Bamford, W.A. Heckler, G.W.
Copyright Year	2007
Abstract	Although GPS has found wide application for precision spacecraft navigation and formation flying applications in low Earth orbit (LEO), its application to geosynchronous (GEO) and other high-altitude missions has been limited to an experimental role because of the sparsity and weakness of the GPS signals present there. To fill this gap, NASA Goddard Space Flight Center (GSFC) has developed a new space-borne GPS receiver called Navigator that can operate effectively in the full range of Earth orbiting missions from LEO to GEO and beyond. Navigator employs special signal processing algorithms in radiation-hardened hardware that enable very fast signal acquisition capabilities and, more importantly, greatly improved sensitivity (a 10-dB improvement over previous space-based GPS receivers). Because of these unique capabilities, Navigator has generated a large amount of interest in the spacecraft navigation community. The first flight version of the receiver has been integrated into a relative-navigation experiment on the Shuttle-based Hubble Space Telescope Servicing Mission 4, due to launch in 2009. Navigator will be also serving as a critical navigation sensor on NASA's Magnetospheric Multiscale mission, which is one of NASA's first high-altitude formation-flying missions, NASA's Global Precipitation Measurement mission, and the Air Force Research Lab's Plug-and-Play spacecraft. Finally, key aspects of the Navigator design are being integrated into a GPS receiver being developed for NASA's Orion Crew Exploration Vehicle.
Sponsorship	IEEE Signal Processing Society
Starting Page	541
Ending Page	556
Page Count	16
File Size	1646882
File Format	PDF
ISSN	19324553
Volume Number	3
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Global Positioning System Satellite navigation systems Space vehicles Low earth orbit satellites Space missions Force measurement NASA Signal processing algorithms Hardware Signal processing weak-signal Above-the-constellation Global Positioning System (GPS) Global Precipitation Measurement Mission (GPM) Magnetospheric Multiscale Mission (MMS) Orion Remote Navigation Sensor (RNS) space
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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