Real-time GPS Signal Simulator

Metadata Updated: August 1, 2018

With a minimal FTE investment and no additional procurement funds, the development of a low fidelity orbital GPS Signal simulator would is possible.[HTML_REMOVED][HTML_REMOVED]This IRAD leverages existing Navigator software, MATLAB simulation tools, Goddard Enhanced Onboard Navigation System (GEONS), and TDRSS Waveform and Noise Generator (TWANG).[HTML_REMOVED] A small amount of work is required to integrate these existing products together to develop a GPS signal simulator.The existing GEONS API interface will be used to provide the following information about the various GPS transmitting satellites: GPS satellite signals available, signal power estimates, signal delays, and signal frequencies.An existing low-fidelity data bit generator will be leveraged that ingests GPS ephemeris/almanac data and produces the data bit stream that is generated by the GPS satellites.[HTML_REMOVED] The software for the data bit generator is to be updated to conform more closely to the GPS data bit structure.The GPS Satellite[HTML_REMOVED]s signal information (power, Doppler, and delay) and raw data bit message would be fed into either TWANG, or part of Navigator[HTML_REMOVED]s software would be repurposed for this application.[HTML_REMOVED] Raw RF data would be output into a file, or onto a TCP socket. The recorded raw RF data would be replayed through our existing software receiver for initial testing.Existing Universal Software Radio Peripherals (USRPs) in the lab would transmit the raw RF data to one of the Formation Flying Test Bed[HTML_REMOVED]s (FFTB) GPS receivers for testing, or into a separate USRP and then into the software receiver for hardware testing.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_90782
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 458a3cd2-20ab-4ba8-89c6-502da94750db
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-09-01T07:00:00.000Z
Homepage URL https://techport.nasa.gov/view/90782
Language en-US
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2017-12-06T00:00:00.000Z
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Source Datajson Identifier True
Source Hash 52ec9133f72bdc36c97a6dd876e4bc412bc3897c
Source Schema Version 1.1

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