REG NASA-LLIS-0276--1993 Lessons Learned Inadequate Ground Data Processor.pdf

1、Lessons Learned Entry: 0276Lesson Info:a71 Lesson Number: 0276a71 Lesson Date: 1993-07-09a71 Submitting Organization: JPLa71 Submitted by: Jim TaylorSubject: Inadequate Ground Data Processor Abstract: Contractor proposals for digital processors were rejected for cost reasons in favor of upgrading a

2、unit under development by JPL. However, the use of R&D equipment resulted in unacceptable performance and reliability.When funding constraints require consideration of trade-offs or use of R&D equipment, evaluate the reliability and capability of the equipment. Description of Driving Event: To proce

3、ss the Synthetic Aperture Radar (SAR) data received from the SEASAT spacecraft, the project first evaluated contractor proposals for digital processors. They rejected all as too expensive and chose instead to upgrade an existing JPL “research and development“ (R&D) optical correlator. The R&D correl

4、ator did successfully process SEASAT SAR images. However, the project had insufficient funds remaining to include the planned automatically controlled mode. The R&D correlator also proved less reliable than operational equipment, thus did not process the expected volume of data.Lesson(s) Learned: Th

5、e Ground Data Processor is a key element in any end-to-end data system such as a Synthetic Aperture Radar system.Recommendation(s): When funding constraints require that trade-offs be made and the use of R&D equipment is Provided by IHSNot for ResaleNo reproduction or networking permitted without li

6、cense from IHS-,-,-contemplated, one must evaluate the operability and maintainability for continued reliable operations support.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Ground Equipmenta71 Hardwarea71 R

7、isk Management/Assessmenta71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 1987-10-13a71 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-,-,-