Near real-time altimetry for river monitoring—a global assessment of Sentinel-3
Bibliographic Data
| ID | 15545981 |
|---|---|
| Authors | Liguang Jiang (0000-0001-7907-1677, Southern University of Science and Technology, corresponding author), Yanan Zhao (0000-0001-6095-1914, Southern University of Science and Technology), Karina Nielsen (0000-0001-9685-9570, Technical University of Denmark), Ole Andersen (0000-0001-9024-6060, Technical University of Denmark), Ole B Andersen, Peter Bauer‐Gottwein (0000-0002-9861-4240, Technical University of Denmark), Peter Bauer-Gottwein |
| Year | 2023 |
| Volume | 18 |
| Issue | 7 |
| Pages | 074017-074017 |
| Publication date | 2023-06-09 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/acdd16 |
| OpenAlex | W4380087129 |
| Language | EN |
| References cited | 42 |
For applications such as weather, flood, and drought forecasting that need water level estimates as soon as possible, near real-time (NRT) products are most appropriate. Unlike in-situ sensors for water level measurements, which typically deliver NRT data, satellite altimeters deliver physically meaningful observations with substantial delays after acquisition. The new radar altimetry mission, Sentinel-3, is capable of delivering NRT water levels within a few hours of observation. Currently, it remains unexplored how accurate the NRT product is in the context of river monitoring. This study assesses Sentinel-3A/B NRT products in mapping river water level variations globally. Based on a three-year comparison, we find that the water level derived from NRT is almost as good as that from the delayed products (median root-mean-square error (RMSE): 21.5 cm and 23.5 for S3A and S3B), and both products achieve very similar RMSE values (median: 52.5 cm and 59.0 cm for NRT and non-time critical) against in-situ data at 25 locations. This study highlights the usefulness of Sentinel-3 NRT product for river monitoring and forecasting. And we recommend the NRT product if latency is a primary concern
Altimeter · Climatology · Remote sensing · Satellite altimetry · Environmental Science · Flood Risk Assessment and Management · Hydrology and Sediment Transport Processes · Hydrology and Watershed Management Studies · Geology
| Citation velocity | historical |
|---|---|
| Highly cited | No |