5 months ago
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The NASA ISRO Synthetic Aperture Radar (NISAR) satellite, launched successful July, has entered the subject phase, the ISRO announced connected Friday (November 28, 2025).
The world reflection outer provides all-weather, day-and-night data, which person a wide scope of applications. It is the archetypal outer jointly developed by the Indian Space Research Organisation (ISRO) and the U.S.’s National Aeronautics and Space Administration (NASA).
The NISAR ngo is broadly classified into antithetic phases – launch, deployment, commissioning and subject phases. The last subject operations signifier begins astatine the extremity of commissioning and extends till the extremity of NISAR’s five-year ngo life.
“During this phase, the subject orbit volition beryllium maintained via regular manoeuvres, scheduled to debar oregon minimise conflicts with subject observations. Extensive calibration and validation activities volition instrumentality place,” the ISRO had said earlier.
Following the palmy motorboat of the outer connected July 30 from the Satish Dhawan Space Centre successful Sriharikota, the 12-metre diameter antenna reflector was successfully deployed.
The 12-meter diameter antenna reflector plays a cardinal relation for some ISRO’s S-Band and NASA’s L-Band Synthetic Aperture Radar (SAR) Payload.
The antenna was launched successful a stowed information connected a 9m-long boom, which was tucked adjacent to the satellite. The antenna and the 9m roar was developed by NASA. The unfolding of the joints of the roar commenced connected August 9, and was carried retired implicit a play of 5 days.
The reflector assembly mounted connected the extremity of the roar was deployed successfully connected August 15.
“Since the archetypal acquisition connected August 19, NISAR S-Band SAR has been regularly imaging Indian landmass and planetary calibration-validation sites successful assorted payload operating configurations. Reference targets specified arsenic country reflectors were deployed astir Ahmedabad, Gujarat, and a fewer much locations successful India for calibration of the images. Data acquired implicit Amazon rainforests were besides utilized for calibration of spacecraft pointing and images,” the ISRO said.
It added that based connected this, payload information acquisition parameters were fine-tuned resulting successful high-quality images.
“Initial investigation by scientists and engineers revealed the imaginable of S-Band SAR information for assorted targeted subject and exertion areas similar agriculture, forestry, geo-sciences, hydrology, polar/Himalayan ice/snow, and oceanic studies,” it added.
