The Bengaluru-headquartered space agency was earlier looking to launch the satellite on March 28, subject to weather conditions.
“There is a minor issue with the satellite”, ISRO sources told PTI.
“As of now, we are planning to launch it on April 18”.
GISAT-1 was originally planned to be launched from Sriharikota spaceport, about 100 kms north of Chennai, on March five last year but was postponed a day before the blast-off due to technical reasons.
ISRO sources had earlier said the delay in the launch was due to COVID-19-induced lockdown which affected normal work.
According to ISRO, GISAT-1 will facilitate near real-time observation of the Indian sub-continent, under cloud-free condition, at frequent intervals.
Weighing about 2,268kg, GISAT-1 is the firststate-of- the-art agile earth observation satellite which will be placed in a Geosynchronous Transfer Orbit by GSLV-F10.
“Subsequently, the satellite will reach the final geostationary orbit using its on board propulsion system”, ISRO had said a few days before the planned launch in March last year.