REG NASA-LLIS-0270--1993 Lessons Learned Planning for Spacecraft Real-Time Commanding.pdf

1、Lessons Learned Entry: 0270Lesson Info:a71 Lesson Number: 0270a71 Lesson Date: 1993-07-07a71 Submitting Organization: JPLa71 Submitted by: B. LarmanSubject: Planning for Spacecraft Real-Time Commanding Description of Driving Event: Voyager flight operations strategy and system design was based upon

2、a philosophy of very limited real-time ground commanding, assuming the vast majority of activity could be preloaded onto the spacecraft. Flight experience, particularly early in the mission, proved that the need for real-time commanding was significantly greater than planned. The end-to-end system d

3、esign which was based upon the above strategy was cumbersome to use in a real-time commanding environment.Lesson(s) Learned: Although on-board sequence control is the primary spacecraft command mode, a flexible interface with real-time ground based commanding is required.Recommendation(s): Ensure th

4、at the back-up real-time ground command system has the necessary capability and flexibility for continuous use during all phases of the mission.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted withou

5、t license from IHS-,-,-Mission Directorate(s): a71 Exploration Systemsa71 Sciencea71 Aeronautics ResearchAdditional Key Phrase(s): a71 Communication Systemsa71 Flight OperationsAdditional Info: Approval Info: a71 Approval Date: 1985-12-10a71 Approval Name: Carol Dumaina71 Approval Organization: 125-204a71 Approval Phone Number: 818-354-8242Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-