NDLI: Ionospheric gradient detection methods for ground based augmentation system

Content Provider	IEEE Xplore Digital Library
Author	Raghunath, S. Ratnam, D.V.
Copyright Year	2015
Description	Author affiliation: Dept. of Electron. & Commun. Eng., K.L. Univ., Guntur, India (Ratnam, D.V.) \|\| Dept. of Electron. & Commun. Eng., G. Narayanamma Inst. of Technol. & Sci., Hyderabad, India (Raghunath, S.)
Abstract	Ground-Based Augmentation System (GBAS) augments the performance of Global Navigation Satellite Systems (GNSS) for civil aviation by providing differential corrections to the position of an aircraft during takeoff and landing. GBAS provides continuous and integral positioning service in all weather operations even in zero visibility conditions to enable precision approach up to Category III. The gradients in the ionosphere jeopardize the accuracy with which GNSS can pin-point the position of an aircraft. These ionospheric gradients can be characterized using data from Global Positioning System (GPS) receivers surrounding the airport. In this work we detect the Ionospheric gradient and compute its velocity using the measured values of Slant Total Electron Content (STEC) from two GPS receivers in the low-latitudes around Vijayawada Airport, Andhra Pradesh. The GPS receivers and the Airport considered here are located within 70Km from each other. The drift velocity of the gradients in ionosphere was calculated to be 189.3 m/s on the 1st of November, 2014, for satellite PRN 32, by finding the covariance between STEC values of the two GPS stations.
Starting Page	894
Ending Page	898
File Size	288518
Page Count	5
File Format	PDF
e-ISBN	9781479972258
DOI	10.1109/ECS.2015.7125043
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-02-26
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Augmentation Satellites Ionospheric gradient Receivers Electron mobility Airports Total Electron Content and covariance Aircraft Drift velocity Ionosphere Global Positioning System
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
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