Services on INSAT-3E, one of ISRO’s key communication satellites, were
disrupted for most of Saturday, after the spacecraft lost its crucial
Earth link.
“It is out of danger now, though services are yet to be restored,” a spokesman for the space agency told The Hindu in the evening.
Scientists at the Master Control Facility (MCF) in Hassan, 80 km from
here, started working on restoring the “Earth lock” that was lost in the
morning, he said. Until 8 p.m., there was some success. There were some
glitches and the MCF scientists monitoring and commanding the satellite
should correct them and restore the satellite fully by the end of the
day, he said.
Some of BSNL’s services and many VSATs that support Internet
communication use capacity on 3E. The disruption continued until 8 p.m.
“Their operations weren’t shifted to a different satellite, as is
usually done in such a situation,” he said.
Communications satellites, circling at around 36,000 km from the ground,
face a particular point on Earth. INSAT-3E is turned Earthwards on top
of the country and has a 24-hour orbit. It lost this link at 9.50 a.m.
Weighing 2,750 kg, it is the country’s third-generation satellite. Built
for a life of 15 years, it is now approaching its ninth year in orbit.
It was launched on September 28, 2003, on a European vehicle, and placed
at 55 degrees East longitude. It carries 24 transponders in the C-band,
and 12 in the extended C-band, to support broadcasting and
communication services of public and private sectors.
ISRO’s satellites often outlive their designed life.
GSAT-10, the country’s next communication satellite, will now fly on September 29 on a European vehicle.
Space agency ISRO has announced the new date on its website. The launch
was deferred from September 21, after scientists at the Kourou Launch
pad in South America noticed some dust in the rocket. That has
apparently been corrected. The 3.4-tonne spacecraft carries 36
transponders — including 12 Ku, 12 C and 12 extended C-band. The
capacity will support DTH (direct-to-home) and normal broadcasting and
communication. It also has the second of the GPS Aided GEO Augmented
Navigation (GAGAN) payload, which will fine-tune or ‘augment’ GPS
readings used by pilots of civil airlines. (GAGAN is a project of the
Airports Authority of India and ISRO.)
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