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A Study on Wet Tropospheric Delay Error Estimation for the Navigation Signals over Indian Region

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Title A Study on Wet Tropospheric Delay Error Estimation for the Navigation Signals over Indian Region
 
Creator Srivastava, Ashutosh
 
Subject Wet tropospheric delay
Vapour pressure
Humidity
GNSS
 
Description 656-669
The present work deals with the wet tropospheric delay estimation using the different models for navigation signals over the Indian region. Results from various mathematical models are analysed for saturation vapour pressure, partial vapour pressure, and wet delay estimation. The delay is estimated for four places in India which are spread at different geographical locations. It is observed that the Wexeler model is more suitable for saturation vapour estimation. It shows that the difference between 0.00 to 0.25 mb with reference values throughout the year. Saturation vapour pressure which is derived using the Wexeler model is further used for partial vapour pressure estimation. Four different models were used to estimate partial vapour pressure and Zyuring model is found more suitable among all. The partial vapour pressure values vary from 5 mb to 25 mb at different altitudes. The results of the Zyuring model is further used to derive wet tropospheric delay. It is found that Hopfield model provides difference of up to 4 mm in tropospheric delay, better than any other seven models results which are used for wet delay estimation. Tropospheric wet delay is observed more in daytime as compared to nighttime. From the analysis, it is found that the Hopfield model is more suitable for wet delay estimation and can be used for wet delay corrections in navigation signals for accurate position estimation.
 
Date 2024-08-05T12:00:27Z
2024-08-05T12:00:27Z
2024-08
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/64359
https://doi.org/10.56042/ijpap.v62i8.9272
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJPAP Vol.62(08) [August 2024]