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ATSAT: a MATLAB-based software for multi-satellite altimetry data analysis

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Abstract

Today, satellite altimetry is capable of observing the instantaneous sea level and is regarded as a standard tool in the study of waters level variations on both regional and global scales. In this research, we have introduced a software package under MATLAB called ATSAT, which is used to process the satellite altimetry data. ATSAT is able to process the observations of five satellites, namely Jason-1, Jason-2, Jason-3, Saral and Sentinel-3. This software program has certain capabilities: 1) Reading the observations related to the five satellites in the NetCDF format 2) Producing the time series obtained from the observations of each satellite at any desired point 3) Analyzing the outlier detection in the time series 4) Estimating the weight matrix pertinent to each time series using the Least Square Variance Components Estimation (LS-VCE) method 5) Considering the two noise models of White and White + Flicker for the variance components estimation and formation of the weight matrix for each time series 6) Estimating the average water level, as well as the amplitude of 22 main tide components at any desired point 7) Extracting the available frequencies in each time series using the Least Square Harmonic Estimation (LS-HE) method in the two modes of univariate and multivariate, and finally 8) Calculating the radial orbital error using the crossover adjustment.

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Acknowledgements

The author would like to thank the NASA and AVISO data team for providing the altimeter data. The authors would like to thank the anonymous reviewers for their constructive comments on an earlier version of this article. The useful comments of the editor Hassan A. Babaie and an anonymous reviewer are gratefully acknowledged.

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Authors and Affiliations

  1. School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, North Kargar Street, Central Buliding of the College of Engineering, Tehran, 1439957131, Iran

    Saeed Farzaneh & Kamal Parvazi

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  1. Saeed Farzaneh
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  2. Kamal Parvazi
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Correspondence to Saeed Farzaneh.

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Communicated by: H. Babaie

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Farzaneh, S., Parvazi, K. ATSAT: a MATLAB-based software for multi-satellite altimetry data analysis. Earth Sci Inform 14, 1665–1678 (2021). https://doi.org/10.1007/s12145-021-00585-7

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