David, The satellite has probably got a Rb as its clock (hopefully more than one). All I can imagine is that there has been a major clock failure of some sort, and everything is in free run and unable to sync up with ground.
Thoughts? Rob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David J Taylor Sent: 20 September 2013 17:51 To: Time-nuts mailing list Subject: [time-nuts] Space mission comes to an end becuase of a "computer time tagging" problem NASA's Deep Space Comet Hunter Mission Comes to an end The news release includes this paragraph: "After losing contact with the spacecraft last month, mission controllers spent several weeks trying to uplink commands to reactivate its onboard systems. Although the exact cause of the loss is not known, analysis has uncovered a potential problem with computer time tagging that could have led to loss of control for Deep Impact's orientation. That would then affect the positioning of its radio antennas, making communication difficult, as well as its solar arrays, which would in turn prevent the spacecraft from getting power and allow cold temperatures to ruin onboard equipment, essentially freezing its battery and propulsion systems." Knowing the membership of this group, does anyone have more insight into what the "computer time tagging" problem might be? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: [email protected] _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
