1、Lessons Learned Entry: 1350Lesson Info:a71 Lesson Number: 1350a71 Lesson Date: 2003-07-16a71 Submitting Organization: GSFCa71 Submitted by: Bonita SeatonSubject: ADEOS-II NGN L0 Data Gap Introduction Problem Description of Driving Event: In early February 2003, JPL and NASDA reported gaps in Level 0
2、 data products received from the Wallops and Alaska ADEOS-II Data Processing Systems. Gaps in the SeaWinds product were characterized by JPL to be intermittent in nature, of variable size, and located at irregular intervals in the data products. Reprocessing of the raw data by NASDA yielded 100% dat
3、a recovery. Thus, while there was 100% data capture, data gaps were introduced by the DS resulting in approximately 8% data loss in the Level 0 product (i.e. 8 out of every 100 minutes of data was not included in the Level 0 product). These gaps were undetected at the processing station until report
4、ed by JPL and NASDA.Lesson(s) Learned: Acquire appropriate skill mix for data processing system development and testingRecommendation(s): Recognize that the development of a ground system Level 0 processing capability requires specific and, sometimes, specialized skills. This includes expert level D
5、ata Analysis (DA) and System Administration (SA) skills. DA skills are required to assist in test case development, test results analysis, and for continuing operational support. Once the mission is operational, DA support should be used to periodically perform detailed data analysis to ensure corre
6、ct and complete data receipt from the spacecraft as well as complete and correct Level 0 product generation. SA skills are required to assist in system integration, troubleshooting and system maintenance (both corrective and preventative). In those cases where full-time DA support is not feasible du
7、e to mission size and personnel resource constraints, support personnel can be shared between missions/organizations or DA responsibilities can be added to test plans and standard operations procedures and additional training provided to ensure ability to meet those new responsibilities. Provided by
8、 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 Ground Equipmenta71 Ground Operationsa71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 2003-07-29a71 Approval Name: Al Galloa71 Approval Organization: GSFCa71 Approval Phone Number: 301-286-3756Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
