A brief demonstration of a tool for SARAL/AltiKa waveform clustering

Surajit Dutta, Suvajit Ghosh, Praveen Kumar Thakur

Article ID: 751
Vol 2, Issue 1, 2019, Article identifier:17-19

VIEWS - 164 (Abstract) 70 (PDF)


This article describes a classification tool to cluster SARAL/AltiKa waveforms. The tool was made using Python scripts. Radar altimetry systems (e.g., SARAL/AltiKa) measures the distance from the satellite centre to a target surface by calculating the satellite-to-surface round-trip time of a radar pulse. An altimeter waveform represents the energy reflected by the earth’s surface to the satellite antenna with respect to time. The tool clusters the altimetric waveforms data into desired groups. For the clustering, we used evolutionary minimize indexing function (EMIF) with k-means cluster mechanism. The idea was to develop a simple interface which takes the altimetry waveforms data from a folder as inputs and provides single value (using EMIF algorithm) for each waveform. These values are further used for clustering. This is a simple light weighted tool and user can easily interact with it.


SARAL/AltiKa Waveforms; Evolutionary Minimize Indexing Function (EMIF); Python

Full Text:



Ghosh S, Thakur PK, Sharma R, et al. The Potential Applications of Satellite Altimetry with SARAL/AltiKa for Indian Inland Waters. Proceedings of the National Academy of Sciences, India Section A: Physical Sciences 2017; 1;87(4):661-77.

Ghosh S, Thakur P, Dutta S, et al. A new method for SARAL/AltiKa Waveform Classification: contextual analysis over the Maithon reservoir, Jharkhand, India. In SPIE Asia-Pacific Remote Sensing International Society for Optics and Photonics 98780G-98780G, 2016.

Ghosh S, Thakur PK, Garg V, et al. SARAL/AltiKa Waveform Analysis to Monitor Inland Water Levels: A Case Study of Maithon Reservoir, Jharkhand, India. Marine Geodesy 2015; 38(1): 597-613.

Verron J, Sengenes P, Lambin J, et al. The SARAL/AltiKa altimetry satellite mission. Marine Geodesy 2015; 38(sup1): 2-21.

Chelton DB., Ries JC., Haines BJ, et al. Satellite altimetry. International Geophysics 2001, 69, 1-ii.

Guo JY, Hwang CW, Chang XT, et al. Improved threshold retracker for satellite altimeter waveform retracking over coastal sea. Progress in Natural Science 2006; 16(7): 732-738.

DOI: http://dx.doi.org/10.24294/jgc.v1i2.751


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License

This site is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.