NASA-ISRO’s NISAR satellite has successfully deployed its 39-foot radar antenna reflector in low Earth orbit 17 days after launch, NASA announced on Friday. This antenna is an essential component that will aid the satellite in monitoring changes in forests and wetlands, delivering crucial data to assist in disaster response, infrastructure oversight, and agricultural practices. Known as NISAR’s advanced Synthetic Aperture Radar, it will also observe ice sheets, glaciers, and land deformations caused by earthquakes, volcanoes, and landslides with ‘remarkable’ accuracy. This will further enhance scientific comprehension and decision-making concerning the preparedness for these natural events. With an estimated cost exceeding $1.3 billion, NISAR was launched from the Satish Dhawan Space Centre in Andhra Pradesh on July 30. “The successful deployment of NISAR’s reflector signifies a major milestone in the satellite’s capabilities. The data that NISAR is set to collect will significantly influence how global communities and stakeholders enhance infrastructure, prepare for and recover from natural disasters, and ensure food security. NISAR is equipped with NASA’s most sophisticated radar systems, integrating L-band and S-band synthetic aperture radar for the first time. The L-band can penetrate clouds and forest canopies, while the S-band is capable of detecting light vegetation and snow moisture, as stated by the US space agency in a blog post. The reflector is crucial for both radar systems, making its deployment vital for the mission’s success.
“This is the largest antenna reflector ever deployed for a NASA mission, and we were, of course, eager to see the deployment proceed successfully. It is a critical component of the NISAR Earth science mission and has taken years to prepare for this significant day,” remarked Phil Barela, NISAR project manager at NASA’s Jet Propulsion Laboratory in Southern California. The Jet Propulsion Laboratory played a significant role in the United States segment of the mission. The current emphasis is on refining the satellite to guarantee that it starts transmitting scientific data by the end of this year. In the context of the mission, ISRO supplied the S-band radar through its Space Applications Centre and the spacecraft bus via the U R Rao Satellite Centre. The launch services were conducted at the Satish Dhawan Space Centre. At the same time, ISRO will persist in managing essential mission operations, which include data processing and monitoring the satellite’s health, utilizing its Telemetry, Tracking and Command Network’s worldwide network of ground stations.
