NDLI: A web processing service for GNSS realistic planning

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A web processing service for GNSS realistic planning

Content Provider	Springer Nature Link
Author	Federici, Bianca Giacomelli, Davide Sguerso, Domenico Vitti, Alfonso Zatelli, Paolo
Copyright Year	2011
Abstract	The spread presence of Global Navigation Satellite Systems (GNSS) Permanent Station Networks makes satellite surveys simpler, quicker and cheaper and the achievement of high precisions easier. However, the result of a GNSS campaign benefits from an accurate planning, especially in presence of natural or artificial obstructions that make satellite observations difficult. Most of the GNSS office suites provide planning tools to analyse the satellite’s visibility; visibility plots, sky plots and dilution of precision charts are commonly built from the GNSS almanac. They usually allow planning on single points, taking into account the obstructions due to terrain morphology or buildings by hand-drawing polar diagrams after a visit of each location to be surveyed. This task can be made fully automatic by using a digital surface model to build the obstruction plot and the almanac to evaluate satellites’ positions, hence their visibility and not only availability, in a GIS. The procedure may be applied to whole areas to find the best time for the survey campaign. Taking a step further, this approach has been made available as a service by creating a Web Processing Service, which allows also non-GIS specialists to access this tool through a simple WebGIS interface. The user can select the satellites constellation, GPS or GPS and GLONASS, the cut-off elevation angle and the day, hour and temporal window of the survey. The service returns raster maps describing the minimum number of visible satellites and the maximum positioning dilution of precision index in every pixel for the temporal window. Moreover, the service implements some features of the UNAVCO Translation, Editing and Quality Check software, which can help to choose the location of new permanent stations. The implementation follows the OGC specifications and relies fully on Free and Open Source Software, combining different systems to provide the user web interface, the data storage and the processing engine. The service features, the underlying technology, and some examples will be presented in this paper.
Starting Page	45
Ending Page	57
Page Count	13
File Format	PDF
ISSN	18669298
Journal	Applied Geomatics
Volume Number	5
Issue Number	1
e-ISSN	1866928X
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-30
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	GIS Planning GNNS Internet Services Geographical Information Systems/Cartography
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Geography, Planning and Development Engineering Environmental Science

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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