Drishti satellite: India Launches Optical-Radar Imaging Satellite via SpaceX

Context: Drishti satellite

GalaxEye launched “Drishti” (Mission Drishti) via Falcon 9 of SpaceX — first satellite to capture optical + radar images of the same place at the same time.

Core Idea

  1. OptoSAR technology = Optical + Synthetic Aperture Radar (SAR)
  2. Both sensors on same satellite
  3. Capture same location, same time

Optical vs Radar

  1. Optical → like a camera → clear images but fails in clouds/night
  2. Radar (SAR) → uses microwaves → works through clouds, smoke, night but gives rough/structural images

Drishti combines both → clear + all-weather imaging together

Why it is important

  1. No time gap (earlier multiple satellites needed)
  2. All-weather, day-night monitoring
  3. Better for disaster, defence, agriculture
Drishti satellite
Drishti satellite
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