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A Novel Approach for the Determination of the Height of the Tropopause from Ground-Based GNSS Observations

Mendez Astudillo, Jorge; Lau, Lawrence; Tang, Yu-Ting; Moore, Terry

Authors

Jorge Mendez Astudillo

Lawrence Lau

Yu-Ting Tang

Terry Moore



Abstract

In this paper, we present a new method to calculate the height of the second lapse-rate tropopause (LRT2) using GNSS high-precision data. The use of GNSS data for monitoring the atmosphere is possible because as the radio signals propagate through the troposphere, they are delayed according to the refractive index of the path of the signal. We show that by integrating the vertical profile of the refractive index in the troposphere, we are able to determine the altitude of LTR2. Furthermore, as GNSS data is available from many stations around all latitudes of the globe and make up a network with high spatial and temporal resolution, we can monitor the diurnal cycle of the variables related to the refractive index of the path of the signal. A comparison between the heights of the LRT2 obtained with radiosonde data and with this novel method is presented in the paper, and it shows good agreement. The average difference found is ≤1 km for stations between the latitudes of 30°S and 30°N.

Journal Article Type Article
Publication Date Jan 16, 2020
Journal Remote Sensing
Electronic ISSN 2072-4292
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 12
Issue 2
Article Number 293
APA6 Citation Mendez Astudillo, J., Lau, L., Tang, Y., & Moore, T. (2020). A Novel Approach for the Determination of the Height of the Tropopause from Ground-Based GNSS Observations. Remote Sensing, 12(2), https://doi.org/10.3390/rs12020293
DOI https://doi.org/10.3390/rs12020293
Keywords Lapse Rate Troposphere (LRT); Zenith Tropospheric Delay (ZTD); GNSS atmospheric monitoring
Publisher URL https://www.mdpi.com/2072-4292/12/2/293

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