![]() ![]() Routine product updates will be halted in April as the old (Jason-3) and new (Sentinel-6) time series are merged and validated. The Sentinel-6 Michael Freilich satellite (previously called “Jason Continuity of Service” or Jason-CS) will take over the monitoring of the lake and reservoir surface heights at 10-day resolution. On April 7th 2022 the Jason-3 satellite will be moved to its new end-of-life orbit. Cross-checking of the updated time series by the team will continue until end of October 2022. The existing TOPEX/Jason 10-day products are being extended using the Sentinel-6A data. ![]() Data from the Sentinel-6A Michael Freilich mission is now offering near real time lake monitoring. August 2022:The 10-day resolution water level products are once again operational. ![]() October 2022: The 10-day product for 004103.Manwan was incorrect, it has now been corrected.Note that severe water loss due to a dam breach in June 2023 will result in erroneous elevation values as the dry lake floor emerges. July 17th 2023: Products for the Kakhovskoye Reservoir (000873, 100873, 200873) have been revised.The 10-day resolution time series graph products now include a zoomed-in snapshot of the last 3 years of water level variation. August 2023: All lake products in the State of Alaska have been slightly modified to reflect a change in atmospheric correction.End users should note the product version number in the graph legend and table header, and avoid utilizing products of mixed heritage. These can vary according to the smoothing function applied and so are provided as a visualization aid only. The smoothed height variation (lower graphs) products are not available.End users must check the product summary Tables (column H) which highlight historical or current potential DEM issues for the lake/reservoir. There are cases where this DEM setting is incorrect resulting in either a) the seasonality not being captured or b) the observed seasonality being dampened. The more recent radar altimeters are using an on-board DEM to more rapidly acquire the water surface.In such cases check the specific geographical location in the text product header. ![]() It is important to consider the location of the satellite ground track AND the section of track used in complex or drought-prone regions where height variability may be location dependent.FAQ – Product Choice, Accuracy, and Datums.Lake/Reservoir Status Product Table (.csv). ![]()
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