NDLI: Influence of troposphere in PPP time transfer

Content Provider	IEEE Xplore Digital Library
Author	Baire, Q. Defraigne, P. Pottiaux, E.
Copyright Year	2009
Description	Author affiliation: Royal Observatory of Belgium, Brussels, Belgium (Baire, Q.; Defraigne, P.; Pottiaux, E.)
Abstract	PPP time transfer analysis requires the estimation of position and troposphere delay parameters. The aim of this study is to investigate the influence of troposphere modeling or of external troposphere corrections in PPP time transfer using a least-square analysis, like in the Atomium software. It is investigated using both simulated and real data. We also test the use of two external troposphere products as troposphere corrections, rather than estimate the troposphere parameter in the least-square. Results for two GPS stations are presented here. They show a significant improvement of the clock solution when using external troposphere products. Since external troposphere products are not always available for all stations, we also test a new approach for the troposphere estimation: using constraints on the troposphere parameter, reducing the sampling rate of this parameter to 15 minutes along with an evolution constraint of 1 mm between successive estimation epochs of the wet tropospheric delay. With this method, the clock solution gets the same level of precision as when the troposphere is corrected with external products rather than estimated.
Starting Page	1065
Ending Page	1068
File Size	1521375
Page Count	4
File Format	PDF
ISBN	9781424435111
ISSN	10756787
DOI	10.1109/FREQ.2009.5168359
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-20
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Terrestrial atmosphere Delay estimation Clocks Global Positioning System Sampling methods Delay effects Testing Frequency Signal analysis Interpolation
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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