Science & Technologyv1 · 1 version
NISAR — The NASA-ISRO Radar Satellite
NISAR is the most capable Earth-imaging radar ever flown, a roughly 2.4-tonne satellite built jointly by NASA and ISRO that scans the planet with two radar frequencies at once. Sent up on an Indian GSLV rocket on 30 July 2025, it is the first spacecraft to carry both an L-band and an S-band synthetic-aperture radar, and it sweeps the whole globe every 12 days, by day or night and straight through cloud, catching ground shifts no wider than a fingernail.
Last updated 14 July 20266 min read
Latest update
NISAR in routine science operations: launched 30 Jul 2025 on GSLV-F16, the first dual-band (L+S) radar satellite images all of Earth every 12 days and streams about 85 TB/day of open data.
Read the full living note — free
The complete note in both exam lenses (UPSC analytical / fact capsule), its full version history, and “what changed since you last read” — plus tonight's quiz.
Open in CA·WikiAI-assisted, human-reviewed · sourced from PIB, RBI & ministries · editorial policy