Chennai, Apr 14 (UNI) US Space Agency NASA and the Indian Space Research

Organisation (ISRO) are reviewing potential dates for the launch of INDO-US joint

NISAR Satellite Mission.

The satellite, to be placed in a Low Earth Orbit, has been tested at ISRO facility in

Bengaluru and will be transported to the spaceport of Sriharikota, about 110 km from

here.

The launch is likely either in May or June depending upon the launch window availability

after undergoing further tests of satellite at the SHAR Range.

In an update, NASA in its website said Work on the NISAR satellite has been completed

at the ISRO Satellite Integration and Testing Establishment in Bengaluru, and preparations

are underway to transport it to the launch site at the agency’s Satish Dhawan Space Centre

in Sriharikota on India’s southeastern coast.

NASA and ISRO now are reviewing potential launch dates for the NISAR (NASA-ISRO

Synthetic Aperture Radar) mission.

Launch services are provided by ISRO, using the Geosynchronous Launch Vehicle Mark-II

rocket that will carry the spacecraft into a Low Earth Orbit.

The launch readiness date for the mission will be determined by the two agencies in the

coming weeks, NASA said. .

In fact, the Satellite was already shifted to Sriharikota from Bengaluru for the launch but

has been taken back due to some technical glitch in reflector antenna, which is a crucial

part of NISAR's radar system. .

"The NISAR satellite, a joint venture between NASA and ISRO, was indeed taken back

from Sriharikota for further testing, specifically for the reflector antenna, which is a crucial

component of the NISAR's radar system".

It experienced an issue that required a thermal coating to be applied, leading to its return

to the US for rectification.

This delay has pushed the launch date of NISAR to later in the year.

The issue pertained to the NISAR satellite is the reflector antenna, which is 12 meters in

diameter, was found to have a potential overheating problem during flight.

"To address this, the reflector antenna was returned to the US for a special thermal coating

to prevent overheating. After the coating was applied, the antenna was returned to India for

reintegration with the NISAR satellite and further testing", NASA said.

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