Wed, Jun 04, 2008
May 30 Launch Scrubbed Until Cause For Fault Determined
Arianespace tells ANN a software
programming glitch discovered during final checks of last Friday's
planned Ariane 5 ECA mission is under review by an independent
group of experts, and will be fully solved before the dual-payload
flight is rescheduled.
The Ariane 5's flight software is regularly updated to
incorporate data from recent launches, and a routine pre-liftoff
validation before the planned May 30 mission pinpointed an
erroneous software element that would be used only in the event of
an in-flight failure.
"Our policy is to fully understand the reason for such a
situation. The utilization of this group of experts allows for a
thorough, independent review that not only will determine what
happened, but also will ensure that such conditions do not occur
again," explained Arianespace Chairman & CEO Jean-Yves Le Gall.
"We rapidly informed our customers of the situation, and will keep
them fully advised -- which is in line with our policy of
transparency."
Le Gall said the Ariane 5 ECA's flight software program had been
modified after the successful March 9 launch of an Ariane 5 ES
version, which orbited Europe's Automated Transfer Vehicle (ATV)
re-supply spacecraft for the International Space Station. This
mission was followed by another on-target flight on April 18 with
an Ariane 5 ECA, which carried a dual-satellite telecommunications
payload. The programming glitch is thought to have occurred during
software updates made after the ATV flight.
Le Gall chaired the first meeting of the group of experts on
June 2, which is expected to complete its work late this week. A
new date for the upcoming Ariane 5 ECA flight will then be
established - with June 12 as the earliest current target. This
flight is the third of seven Ariane 5 missions planned for 2008,
and will loft the Skynet 5C and Turksat 3A satellites.
At Europe's Spaceport in French Guiana, the Ariane 5 ECA has
returned from the launch pad to the Final Assembly Building, where
the launcher and its payloads remain in a safe standby mode.
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