JPL - May 19, 1999 - Deep Space 1 began on Monday a test of Remote Agent, a package of onboard software capable of planning and executing many spacecraft activities with only general direction from the ground. For nearly one day following its startup at 11 a.m. PDT Monday, Remote Agent successfully controlled the spacecraft and even resolved a simulated instrument failure.
At 7 a.m. PDT on Tuesday, May 18, however, the experiment team detected an anomaly that interrupted execution of the experiment. The first indication occurred when Remote Agent did not command the spacecraft's ion propulsion system to shut down as expected. While some portions of the Remote Agent software continued to operate, the component that issues commands had suspended operation.
The spacecraft was determined to be safe and healthy. The experiment software appeared active and was allowed to continue processing while the experiment team and Deep Space 1 flight team analyzed the problem. After retrieving diagnostic data from the spacecraft, a ground command was issued at 4:10 p.m. PDT Tuesday that halted the experiment.
By the time it was halted, the experiment had already achieved approximately 70 percent of its test objectives. A small bug in the very complex software has been identified as the probable cause of the suspension. A follow-up experiment is being considered for Friday, May 21, to complete the remaining objectives for the Remote Agent test.
Deep Space 1 Reports From Spacer.Com
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.|