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Satellite altimetry has successfully been applied to derive water level time series over lakes and rivers for many years. In the last decade major advancement within the field have been achieved. The SAR altimetry era, initiated with the launch of CryoSat-2, has made it possible to measure much smaller targets more accurately. The standard 20 Hz ra...
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... 2: Outlier-removal scheme 2.1 LH > 30 cm from median 2.2 LH > 3×SD from median Water level variations in the along-track direction of one CryoSat-2 pass that crossed the Lake at 03/10/2020 are depicted in Figure 2. FFSAR-GPOD data of 100 Hz (light blue) and 20Hz (red) are compared with FFSAR-DUT data of ~100 Hz (green) and UFSAR-GPOD OF 20Hz (black). ...
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... time period of the study is 2017-01 -2018-12. First analysis of extracted L2 measurements exhibits some outlier measurements in the FF-SAR data, for both Threshold and ALES+ retrackers (Fig2 & 3). However, the temporal signature of the water level has been fairly captured (Fig. 3), considering the challenging aspect of the study. ...
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... an along-track comparison in coastal and open ocean of FFSAR with GPOD SARVatore and TUDaBo data (Fig. 2), FF-SAR data look noisier than the other products. In the estuarine intertidal and in river parts FF-SAR provides a smooth surface and more data due to its higher sampling. Figs. 3 and 4 show the results in Otterndorf, where the along-track section width is 13 km and in Geerstacht. Figure 4. Water heights from FF-SAR at Geerstacht ...
