Related Paper
MediSAR : [PAPER IN PREPARATION]
Rainfall Estimation with SAR using NEXRAD collocations with Convolutional Neural Networks
Reduction of rain-induced errors for wind speed estimation on SAR observations using convolutional neural networks
Table of Content
Links to data
Summary
MediSAR is a extensive dataset of Synthetic Aperture Radar (SAR) observations of the Mediterranean Sea. It contains all the Interferometric Wide (IW) observations acquired by the Sentinel-1 satellites from the ESA mission Copernicus.
SAR observation are affected by the sea surface roughness. Several meteorological and oceanic processes impact this sea surface roughness: it increases with the wind speed or the hydrometeors, but decrease in presence of biological surfactant such as oil pollution or biofilm. Therefore, it is possible to infer these processes from the SAR observation.
Content
This dataset contains data from 2014 to 2022, both included. Due to size limitation, a kaggle dataset is provided for each year. Each IW product is contains in a folder {YYYY}/{YYYY}-{MM}-{DD}/{YYYY}{MM}{DD}t{hh}{mm}{ss}
. These folders contains:
- The SAR observations of co- (vv) and cross- (vh) polarization channels. Downscaled at 200 m/px and stored as uint16.
- The rain estimation, as four-class segmentation roughly based on 1 mm/h, 3 mm/h and 10 mm/h. There are stored at 400 m/px on four channels, the transparency corresponding to the land mask.
- The biological slicks, as a uint8 image at 100 m/px. For compression, they are quantized to 3 bits per pixel.
- The convective cells, as a uint8 image at 200 m/px. For compression, they are quantized to 3 bits per pixel.
- SAR-based wind speed obtained either from Geophysical Model Function, a rainfall-resilient deep learning model and ERA5. They are provided at 1 km/px. The GMF from level-2 product is also included. Both are stored as uint8 images, quantized between 0 and 25.6 m/s. In case of higher wind speeds,
- Land masks at 200 m/px.
- Collocations with MSG/SEVIRI (brightness temperature) and Sentinel-3/OLCI (chlorophyll concentration).
SAR Observations
20170421t181750
Rain Estimation
20171229t163858
Biological Slicks
20170316t172911
Sentinel-3 OLCI
20220511t055414
Convective Cells
20171218t044059
MSG/SEVIRI
20210103t170440
SAR-based wind speed
20211207t155813
Notebooks
Changelog
- 2023-03-26: Add MSG/SEVIRI notebook.
- 2023-03-21: Add Sentinel-3/OLCI data.
- 2023-02-15: Add incidence angle, interpolated ERA5 wind speed, aggregation maps.
- 2023-01-30: Readme bugfix.
- 2023-01-29: Release V1. Add years 2014 & 2022. Add wind speeds from L2 OCN and deep learning model..
- 2023-01-08: Add years 2016, 2017, 2018 & 2021.
- 2023-01-02: Add years 2019 & 2020.
- 2023-01-01: First upload.
Roadmap
-
Finish the MSG/SEVIRI collocations for brightness temperature. Currently, borders were incorrectly filled with nearest value rather than NaN.
-
Redo the VH quicklooks (GMF change).
-
Publish the paper.