THE QUESTION BENEATH THE SURFACE
Water moves.
Its signals change.
When does water appear in open channels, and when does an inundation signal emerge beneath vegetation?
Calm water often returns little radar energy. Water and stems can return a brighter signal through double bounce. Follow both indicators through one observed season.
01 THE OBSERVATORY
A landscape,
in motion.
Connecting to the data feed
Listening to the landscape.
Loading published NISAR acquisitions and measurements.
02 A DIFFERENT MOMENT
Same place.
A shifting story.
Two acquisitions, geographically aligned.
Drag the divider to follow the change.
Comparison awaits the data feed.
Both published observations are required.
HISTORICAL OPEN WATER
Years of water,
seen from orbit.
Asad’s published JRC occurrence layer puts the radar observations beside a longer optical record.
Geographic view loads as you approach.
NISAR classifications are threshold-based indicators within one radar footprint. Historical Landsat data measures annual open water and is a different observation. Data & methodology ↗ NISAR GCOV ↗