NDLI: Precise phase calibration of a controlled reception pattern GPS antenna for JPALS

Content Provider	IEEE Xplore Digital Library
Author	Ung Suok Kim De Lorenzo, D.S. Akos, D. Gautier, J. Enge, P. Orr, J.
Copyright Year	2004
Description	Author affiliation: Stanford Univ., CA, USA (Ung Suok Kim; De Lorenzo, D.S.; Akos, D.; Gautier, J.; Enge, P.)
Abstract	The Joint Precision Approach and Landing System (JPALS) is being developed to provide navigation to support aircraft landings for the U.S. military. One variant of JPALS is the Shipboard Relative GPS (SRGPS), which will be implemented on an aircraft carrier. In order to meet strict accuracy, integrity, continuity, and availability goals in the presence of hostile jamming and in a harsh multipath environment, advanced technologies are required. One of those being studied is a controlled reception pattern antenna (CRPA) array with beam steering/adaptive null forming capabilities. The Stanford University GPS Laboratory has developed a software tool to study CRPA algorithms and their effects on GPS signal and tracking characteristics. A testbed has been constructed to investigate hardware issues including the phase center offset of the antenna elements and mutual coupling effects. This testbed consists of a 3 element antenna array with a baseline of 1m, using high-quality survey-grade or lower-quality patch antennas. Data has been taken using this array in conjunction with sufficient satellite constellation and antenna array motion to ensure complete azimuth and elevation signal coverage. A carrier phase-based attitude determination algorithm was used to generate inter-antenna bias residuals, allowing characterization of the virtual phase center of the array. Repeating the testing procedure both with survey-grade antennas, for which the phase center characteristics are well known, and with a patch antenna possessing unknown phase center behavior, allows characterization of the azimuth- and elevation-dependent properties of the patch antenna phase center. In addition, mutual coupling effects have been investigated by adding inactive patch elements around the active patch antenna. All results are compared to predictions from detailed simulation of the patch antenna used using an EM modeling software package.
Sponsorship	IEEE Aerospace & Electron. Syst. Soc
Starting Page	478
Ending Page	485
File Size	588745
Page Count	8
File Format	PDF
ISBN	0780384164
DOI	10.1109/PLANS.2004.1309032
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-04-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Global Positioning System Patch antennas Antenna arrays Aircraft navigation Military aircraft Testing Adaptive arrays Mutual coupling Phased arrays
Content Type	Text
Resource Type	Article

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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