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Effect of satellite altimetry sampling error in estimating reservoir storage and outflow.
- Source :
-
Geocarto International . 2022, Vol. 37 Issue 25, p7580-7590. 11p. - Publication Year :
- 2022
-
Abstract
- The potential of satellite imagery to complement the in-situ gauge networks in monitoring freshwater is well established. However, Temporal Sampling (TS) intervals of satellite altimetry impart significant uncertainty compared to daily or sub-daily in-situ gauge measurements. This study examines the effect of infrequent TS from satellite altimetry, i.e. 10-Day (Jason-2/3), 21-Day (SWOT), 27-Day (Sentinel-3A) and 35-Day (SARAL/AltiKa) for the evaluation of reservoir storage and outflow. The metrics of Relative Error (RE), Root Mean Squared Deviation (RMSD), and the correlation between altimetry-based and in-situ observations have been used for the evaluation. Results show that the altimeters having a high TS frequency, such as 10-Day or 21-Day, performed well with RMSD less than 0.2m and correlation more than 98% in estimating satellite-based storage and outflow compare to coarse 27-Day or 35-Day TS. This study improves the understanding of sampling error in satellite altimetry, which has immense potential for future SWOT altimeter mission. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10106049
- Volume :
- 37
- Issue :
- 25
- Database :
- Academic Search Index
- Journal :
- Geocarto International
- Publication Type :
- Academic Journal
- Accession number :
- 172017082
- Full Text :
- https://doi.org/10.1080/10106049.2021.1980615