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Tightly Coupled Oscillator and GPS Receiver

Award Information
Agency: Department of Defense
Branch: Army
Contract: W56KGU-18-C-0010
Agency Tracking Number: A171-051-1462
Amount: $129,270.35
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A17-051
Solicitation Number: 2017.1
Timeline
Solicitation Year: 2017
Award Year: 2018
Award Start Date (Proposal Award Date): 2017-10-27
Award End Date (Contract End Date): 2019-02-26
Small Business Information
10191 Park Run Drive, Las Vegas, NV, 89145
DUNS: 602376829
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Keith Thomas Loiselle
 (702) 233-1334
 keith@jackson-labs.com
Business Contact
 Gregor Said Jackson
Phone: (702) 233-1334
Email: saidjack@jackson-labs.com
Research Institution
N/A
Abstract
Legacy GPS receivers do not make use of the disciplined atomic oscillator flywheel output in GPS Disciplined Oscillator systems. The attached proposal shows how the disciplined oscillator signal can be used to improve GPS carrier and code tracking, mitigate multipath, jamming and spoofing, and to detect GPS receiver and satellite system anomalies. Using the disciplined oscillator as the frequency reference inside the GPS receiver itself results in better jamming and spoofing immunity, faster re-acquisition, direct-Y code acquisition after a cold-start, and complete removal of the 1PPS sawtooth. Multi-sensor fusion using a built-in Inertial Navigation Subsystem (INS) and the Chip Scale Atomic Clock (CSAC) is used to detect physical motion allowing detecting and mitigation of spoofing and multipath signals and the reduction of clock errors. The built-in INS also allows detecting if the unit is operating in a stationary position mode, which the proposed algorithm can then use to discipline the internal CSAC with as little as a single satellite in view, allowing operation under foliage and in urban canyons. A 3-cornered-hat approach is used in the proposed algorithm to detect and remove errors and abnormalities on any one of the three input signals (GPS, INS, CSAC).

* Information listed above is at the time of submission. *

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