Observe
Compare matched dates and locations. Dark smooth water and brighter vegetation are possible patterns, not universal labels.
DANCING WITH THE SARs
Every wetland
has a rhythm.
Follow Earth's changing surface with radar.
See the observations. Keep the evidence.
NISAR L2 GCOV · REAL RADAR BROWSE06 NOV 2026 · FALSE COLOR22° N
89° E
01 / THE OBSERVATION DESKAN OBSERVATION IS THE START OF A QUESTION.
EARLIER
LATER
Loading georeferenced observations…Loading real radar observations…
FROM VIEWING TO INVESTIGATION
Leave a question on the map.
Record a location and a hypothesis for a field check. Notes are yours; they are not detected changes.
No field notes yet. Move the map to a place of interest, then select “Add field note at center.”
02 / READ THE SIGNALTHREE STEPS BEFORE A CLAIM.
Radar sees a return.
People explain the change.
NISAR sends microwave energy toward Earth and measures the return. Repeated observations reveal patterns worth investigating, including in cloudy conditions and at night.
Test the signal
Use calibrated GCOV raster values, a common grid, valid-data masks, and consistent polarization. A preview image cannot supply a measured change in decibels.
Check the cause
Compare tide, rain, land-cover context, and independent observations before calling a change flooding, vegetation loss, or damage.
Learn more: ASF GCOV product guide ↗ · NASA NISAR mission ↗
03 / THE EVIDENCEEVERY VIEW HAS A SOURCE.
Open the record.
Exact acquisitions, original images, and science download links.
Scope, limitations, and next science milestone
This prototype displays authentic ASF NISAR browse images aligned using their accompanying KML geographic bounds. It does not compute change detection, wetland area, displacement, risk, or a confidence score. Browse images may have different display stretches, so colors must not be compared as numerical backscatter values.
Matching catalog metadata is a preliminary compatibility check. It does not establish pixel-level registration or scientific comparability. Black regions outside the observed swath are not evidence of water.
The next milestone is a reproducible calibrated-raster analysis with verified masks, a fixed study boundary, tide and rainfall context, and independent validation. Science HDF5 downloads require a free NASA Earthdata account.
THE IDEA IN ONE SENTENCE
From a satellite observation
to a question worth checking.
Built for “Dancing with the SARs,” NASA International Space Apps Challenge 2026.
Independent prototype. NASA and ISRO do not endorse this application. No measured conservation or operational impact is claimed.