REG NASA-LLIS-0278--1993 Lessons Learned Inadequate Time Allocated for Planning for DSN Support.pdf

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1、Lessons Learned Entry: 0278Lesson Info:a71 Lesson Number: 0278a71 Lesson Date: 1993-07-12a71 Submitting Organization: JPLa71 Submitted by: B. LarmanSubject: Inadequate Time Allocated for Planning for DSN Support Abstract: Planning for the two-spacecraft Voyager mission did not consider the extra tim

2、e needed to arrange for the allocation of Deep Space Network (DSN) coverage for the operation of both spacecraft. Lead times for project and institutional planning must be considered at the time the project mission operations plan is being developed.Description of Driving Event: Flight sequence time

3、lines for the two concurrently operating Voyager spacecraft were inadequate because of omissions due to failure to consider in a timely manner trajectory data and DSN coverage plans for both spacecraft. Significant lead time is required for planning the allocation of Deep Space Network (DSN) facilit

4、ies in support of spacecraft tracking, telemetry, and command operations. Conversely, spacecraft sequences are designed far in advance and are dependent upon expected DSN configurations. The entire effect is exacerbated when multiple spacecraft and trajectories must be accommodated.Lesson(s) Learned

5、: Significant lead time is required for planning the allocation of Deep Space Network (DSN) facilities in support of spacecraft operations.Recommendation(s): Lead times of project and institutional planning processes must be considered at the time the project mission operations system implementation

6、 plan is being developed.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 ScienceAdditional Key Phrase(s): a71 Administration/Organizationa71

7、Flight Operationsa71 Ground Operationsa71 Policy & PlanningAdditional 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-,-,-