NDLI: Angle of arrival geolocation using non-linear optimization

Content Provider	IEEE Xplore Digital Library
Author	Burchett, Lee Hartzell, Stephen Hoffar, Garrett Mautz, Jonathan Taylor, Clark Terzuoli, Andrew
Copyright Year	2012
Description	Author affiliation: Air Force Institute of Technology and Research Laboratory, USA (Burchett, Lee; Hartzell, Stephen; Hoffar, Garrett; Mautz, Jonathan; Taylor, Clark; Terzuoli, Andrew)
Abstract	This paper addresses the problem of object localization using only angle-of-arrival (AoA) data from satellites. Traditionally, this is performed by a triangulation algorithm (TA) that minimizes the distances between the estimated object location to all lines-of-sight representing measurements of the object. However, when observing objects from satellites, the differences in distance from each satellite to the object can be significant. The error this induces in measurements from farther-distant satellites results in an inordinate impact on the geo-location error. To overcome this problem, we introduce a non-linear optimization (NLO) approach that models the measurement error at each satellites as a probability density function. By finding the most-probable geo-location of the object, this systematic error is eliminated. We found that the NLO provides a more accurate estimate of the object's location than the TA in 93% of instances. In addition, we analyze the uncertainty estimates generated by both the TA and NLO approaches. The NLO estimates of uncertainty are also considerably more accurate than the TA estimates in all cases.
Sponsorship	IEEE Geoscience Remote Sensing Soc.
Starting Page	4533
Ending Page	4536
File Size	732531
Page Count	4
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6350462
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nonlinear optics Sensors Measurement uncertainty Estimation Position measurement Accuracy Optimization Triangulation Angle of Arrival Geolocation Localization Non-Linear Optimization
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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