Archive · 29 Nov 2025
NISAR Satellite Deploys Antenna, Enters Science Phase
The NISAR satellite, a joint project by NASA and ISRO, has successfully deployed a large 12-metre antenna in space.
This antenna helps the satellite take detailed pictures of Earth using special radar technology.
The first picture taken by the satellite shows the Godavari River Delta in India, with different types of plants and land clearly visible.
The satellite has been in space since July 30, 2025, and after 100 days, it started its main science work.
The antenna was carefully unfolded in space over several days, and scientists are now using the satellite to study various things on Earth like farms, forests, rivers, and oceans.
The satellite's data will help scientists understand and protect our planet better.
NISAR satellite successfully deployed a 12-metre diameter antenna reflector on August 15, 2025.
The antenna is crucial for both ISRO's S-Band and NASA's L-Band Synthetic Aperture Radar (SAR) payloads.
First S-Band SAR image captured the Godavari River Delta in Andhra Pradesh on August 19, 2025.
Science phase commenced on the 100th day in orbit, with regular imaging of Indian landmass and global sites.
Initial analysis shows potential for applications in agriculture, forestry, geosciences, hydrology, and oceanic studies.
- Who
- NASA and ISRO
- What
- Deployment of 12-metre antenna and entry into science phase of NISAR satellite
- When
- August 15, 2025 (antenna deployment), August 19, 2025 (first image), 100th day in orbit (science phase announcement)
- Where
- Orbit, with operations from ISTRAC and JPL/NASA support
- Why
- To enable S-Band and L-Band Synthetic Aperture Radar (SAR) payloads for Earth observation
- Launch Date
- July 30, 2025
- Antenna Deployment Date
- August 15, 2025
- First Image Date
- August 19, 2025
- Antenna Diameter
- 12 metres
- Boom Length
- 9 metres
- Calibration Locations
- Ahmedabad, Gujarat and Amazon rainforests
- Science Phase Announcement
- 100th day in orbit