NISAR is now in science operations, collecting radar observations across a global reference plan. India’s space agency began releasing systematically processed S-band products from cycle 25, which started July 8, 2026, through its Bhoonidhi data hub.
The NASA–ISRO Synthetic Aperture Radar mission combines L-band and S-band instruments with a 12-metre reflector. ISRO describes a roughly 240-kilometre swath, a 747-kilometre sun-synchronous orbit and a 12-day repeat cycle. Radar can observe through clouds and at night, turning repeated passes into measurements of change rather than isolated pictures.
From image to operating evidence
That distinction matters. Emergency managers need to know where land moved after an earthquake or landslide. Agricultural services need consistent soil and crop signals. Infrastructure operators need millimetre-scale deformation trends. Forest and ice researchers need a comparable record over time. The product is not a dramatic Earth image; it is a calibrated series.
ISRO’s July release notes that historic S-band datasets from before cycle 25 will be reprocessed in phases. That is the quiet work that makes an archive useful. Calibration, validation, consistent metadata and a dependable distribution system determine whether downstream teams can build operational products.
Earth observation creates public value only when the difficult last mile — calibration, access, documentation and local interpretation — works.
A model for space partnerships
NISAR was launched by India’s GSLV-F16 on July 30, 2025. The partnership combines instruments, launch, ground systems and scientific communities rather than dividing the spacecraft into symbolic contributions. It gives India an advanced global data role and NASA a complementary radar architecture.
The commercial opportunity sits downstream: analytics for insurers, utilities, agriculture, carbon measurement and disaster response. But businesses must be honest about uncertainty. Radar interpretation is specialised, ground truth still matters, and a useful alerting service needs more than access to pixels.
Sources
- ISRO, “NISAR S-Band SAR Data Products Release,” July 24, 2026.
- ISRO, Annual Report 2025–26, April 2026.
- ISRO, Launch Missions index, updated September 2026.