UNOSAT is the PM for the Charter Activation Call 660, related to the floods in Laos.
You can find derived satellite products in the UNITAR website with the associated vector data in shp. and gdb.
http://unitar.org/unosat/maps/LAO (see: FL20180723LAO)
The restriction for data use is the same as for Radarsat-2. There are other radar data available without licensee restriction (Sentinel-1), here: https://scihub.copernicus.eu/
Imagery Analyst & GIS Expert, UNOSAT
United Nations Institute for Training and Research (UNITAR)
Palais des Nations, CH-1211 Geneva 10, Switzerland
T +41 22 767 4020