Free and open data
NISAR data is publicly available, allowing AAB to use satellite observations without relying on commercial imagery.
The name
Blue represents water. Atlas After Blue maps the changes left behind after a flood, using satellite observations from space. Shortened, the name becomes AAB, and Aab is the Urdu word for water. The full name describes what the site does. The short form carries where it comes from.
Select a letter to read the name.
Together: a map of a flood's aftermath, seen from space.
آب
AAB · the Urdu word for water
Who this is for
AAB is designed to support provincial disaster-management teams in reviewing satellite observations alongside situation reports and existing damage assessments.
Why it fits
Radar works through clouds
Unlike optical imagery, radar can collect observations through cloud cover and at night.
Transparent methodology
AAB uses an explainable threshold-based approach rather than an opaque classification model.
Uncertainty is explicit
Results are labelled as candidate observations with confidence limitations. They should not be interpreted as confirmed floodwater.
AAB shows how NASA's open radar data can support a small team in Pakistan. It is supplementary evidence and does not replace field assessment.
Team
Who did what on Atlas After Blue.
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AI declaration
Gemini
Data-analysis code assistance.
Claude
Frontend development assistance.
ChatGPT
Logo generation.
AI tools assisted with selected coding and design tasks. The team made the project decisions, selected the analysis thresholds, coordinated development and ran the radar-processing pipeline.
Independent project
Atlas After Blue is an independently developed project submitted to the NASA Space Apps Challenge 2026. It uses publicly available NISAR data and is not affiliated with or endorsed by NASA or ISRO.