1. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 1 Monthly Status Report Report due 5/25/01 Schedule statused as of May 11, 2001

2. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 2 Project Status Summary Technical Mar Apr May Detailed Description: (for items identified as yellow or red) Programmatic Mar Apr May Schedule Mar Apr May Resources Mar Apr May ELS flight unit was successfully re-certified and delivered to MSSL/ IRF on May 15. Calibration has started. We are supporting via telcon and email. Software activities continue to be on track. Latest project photos and videos are available on Aspera-3 web site.photosvideos

3. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 3 Problem and Concern Summary P=Problem C=Concern R=Resolved

4. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 4 Accomplishments of the Last Month -ELS Finished characterization testing of flight unit. Completed re-vibration test of flight unit. Completed post-vibe aliveness test of flight unit. Delivered flight unit to MSSL / IRF on May 15. Have been supporting calibration of flight unit via telcon. Completed assembly of flight spare.

5. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 5 Accomplishments of the Last Month - IMA Supported IRF assembly and test of IMA and IMA detector subassembly via telcon.

6. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 6 Accomplishments of the Last Month - Data Reduction Software APAF Software Requirements Specification (SRS), Version 1.0 –Delivered Electronically April 30, 2001 –Hardcopies Sent to NASA and IRF May 1, 2001 Began Updates to APAF Software Development Plan (SDP) –Version 1.3 to be Released June 7, 2001 Began Packet Definitions for NPI –Waiting for Input from IRF Continued Dialog with ESTEC Staff for ASPERA-3 Data Archiving Plans Continued Providing Technical Assistance for EPO Web Information Continued Defining and Implementing IDFS Web Tools Held monthly ASPERA-3 Software Status Meeting (May 24, 2001)

7. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 7 Planned Activities for the Next Month - ELS Support IRF/ MSSL in the completion of the flight model calibration via telcon.

8. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 8 Planned Activities for the Next Month - IMA Support IRF in the assembly and test of the IMA flight model via telcon.

9. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 9 Planned Activities for the Next Month - Data Reduction Software Tasks Release APAF Software Development Plan (SDP), V1.3 by June 7, 2001 Continue Packet Definitions for NPI Begin Packet Definition Review for IMA Continue Dialog with Staff of PDS PPI Node and ESTEC Staff for ASPERA-3 Data Archiving Plans Attend Mars Express (MEX) Data Archiving Working Group (DAWG) Meeting to be Held June 20-22, 2001 at ESTEC  Splinter Meeting Scheduled for Discussing ASPERA-3 Archiving Issues Continue Providing Technical Assistance for EPO Web Information Continue Defining and Implementing IDFS Web Tools

10. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 10 Problem and Concern Status Funding for ELS board fix: We have implemented the fix to the ELS amp board and have completed re-certification and delivery. The funding is only listed as a concern because we have not yet received the final cost sheets documenting the cost of the repair. All indications are that we under-ran our estimate. Cost sheets are scheduled to be out May 30.

11. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 11 Schedule Summary ELS: ELS was delivered on time to MSSL / IRF on May 15. Software: Software activities continue to be on schedule. The full-up schedule is available on the ASPERA-3 Web site.schedule

12. ASPERA-3 May 25, 01 Monthly Status Report ASPERA Monthly Status ReportMonthly 5_25/ Page 12 ASPERA-3 PHASE B/C/D MASTER SCHEDULE