MAMM Readiness Review

1. MAMM Readiness Review Replanning Process

2. Replanning Strategy • When to replan? • Address two classes of data loss. • Stochastic losses ranging from a few data takes to a few orbits. • Loss of significant mission capabilities. • Loss of McMurdo GRS. • Reduction in SAR on-time capacity.

3. Replanning Strategy (cont.) • Stochastic losses: • Replan to acquire lost image data. • Current strategy is replanning to be limited to cycle-1. • Replans will become “nominal” plan for cycles-2, 3. • Reduction in SAR on-time capability: • Reduce coverage to high priority regions. • “canned” plan being developed • If loss extensive, NRT will work with K.Jezek to reduce coverage to fit within available capacity.

4. Replanning Strategy (cont.) • Loss of McMurdo. • MAMM OBR and US Government OBR allocation combined will increase to 1000 mins. • Convert RTM F1 data acquisitions to OBR. • Total F1 coverage = 817 minutes • Cancel (if required) non-F1 OBR data acquisitions. • Replanning strategy will take into account best estimates of duration of McMurdo outage.

5. Replanning Procedure Overview • Data losses reported via PPS, SRF & Fast Scan. • PPS and SRF sent to CSA. • Fast Scan results delivered directly to NRT. • NRT evaluates net image loss and determines (with CSA CTC) viable replanning options. • Extend already planned acquisition activities. • Add new activities. • Convert F1 acquisitions to F1-Near or F1-Far. • Report replanned activities to ASF for resource tracking.

6. Details of Replanning Process • Data tracking loss detected at MGS, ASF, PASS or GSS. • Post Pass Summary (PPS) faxed to CSA. • Phone call to MMO hotline. • Processing loss detected via SRF and Fast Scan. • ASF scans each tape (SRF) and will generate PPS if error detected. • Fast Scan performed at PASS and GSS by OSU staff. • results transmitted directly to NRT

7. Details of Replanning Process (cont.) • CSA CTC reports details of loss to NRT via MAMM Anomaly Report Form (MARF). • NRT develops replan activities and submits plan to CTC (via MARF) by 13:00 UTC. • CTC constraint checks replan and supplies NRT with CRM form for confirmation. • CTC submits replans to MMO by 14:00 • nominal sequence development commences • NRT supplies ASF with replan SPA files.

8. Replanning Process Rehearsal • Desirable to conduct rehearsal of replanning process. • Individual elements have all been exercised. • End-to-end rehearsal underway during Readiness Review. • Will perform two tests: • Response to tracking data loss at McMurdo • Response to loss detected via SRF at ASF.

9. NASA Replanning Team (NRT) • Two primary functions: • Replanning as required by mission events. • Daily tasks. • Keep track of acquired data. • Generate daily coverage maps. • Members: • Richard Austin (JPL) • Barbara Engelhardt (JPL) • John Crawford (JPL, backup)

10. NRT-Replanning • Primary tool is RadarSAT Swath Planner Application (SPA). • If data loss occurs: • Nominal SPA plan is edited to match loss. • Resultant coverage is examined for holes, reduction in overlap, etc. • Replanned activities (mods to existing, new, or use of F1 Near and Far beams) identified. • Replans generated and submitted to CSA and ASF (OBR and SAR on-time resource tracking).

11. NRT-Replanning (cont.) • Use of F1 near and far beams. • Creates holes with adjacent swaths for lat > 70º S 219 Lost data 76 76 Near 219 Far

12. NRT-Daily Activities • In addition to replanning, the NRT is responsible for assorted daily tasks. • Verify daily data acquisitions. • Use results from PPS, SRF and Fast Scan Results • Generate cumulative coverage maps. • At the end of each day, verified new data will be incorporated into the cumulative map. • The project scientist will include these maps as part of a daily progress report for NASA and CSA.

13. NRT-Staffing