1. SMAP Radiometer RFI Study Status Review 1 Nov 12-13, 2008Piepmeier - SDT Meeting #1 1.Roadmap and schedule 2.Radar study output 3.PALS/ADDS flights 4.Path forward

2. Study Roadmap 2 Nov 12-13, 2008Piepmeier - SDT Meeting #1

3. Modeled Radar RFI 3 Nov 12-13, 2008Piepmeier - SDT Meeting #1 1K

4. PALS Flight Summary for SMAPVEX08 DateFlight 9/22/2008Test Flight, Transit from Grand Junction to Des Moines 9/23/2008Iowa 9/24/2008Iowa 9/25/2008Iowa 9/26/2008Des Moines to Cincinnatti 9/28/2008Cincinnati to Newport News, VA 9/29/2008Newport News to Delaware Site to Wilmington 10/2/2008Delaware Site 10/3/2008Delaware Site (Star Pattern) 10/4/2008Delaware Site 10/6/2008Delaware Site 10/7/2008RFI Survey and PALSAR site*( New Jersey, New York, Connecticut*, Pennsylvania 10/8/2008Delaware Site 10/10/2008Delaware Site 10/11/2008RFI survey (West of Washington) 10/12/2008RFI survey (South of Washington) 10/13/2008Delaware Site 10/14/2008Transit from Wilmington to Atlanta 10/16/2008RFI Survey (Circle around Atlanta) 10/18/2008Transit from Atlanta through Pittsburg, Kansas to Fort Collins 10/19/2008 Transit Fort Collins to Grand Junction SMAPVEX08 from September 22 through October 19, 2008 –Not inc. 1 week installation at Grand Junction –Total of 92 Flight hours 21 PALS-ADD flights on the Twin Otter –3 science flights in IOWA (12 flight hours) –8 science flights in Delaware (37 flight hours) –10 RFI/Transit flights (~ 20 flight hours) Nov 12-13, 2008 4 Piepmeier - SDT Meeting #1

5. PALS/ADDS RFI Flights 5 Nov 12-13, 2008Piepmeier - SDT Meeting #1

6. Preliminary PALS RFI Mitigation Algorithm Line 7 E-W, 3 Oct 2008 Double-Median-Filtering/Threshold Algorithm –The first median filter is applied to the data from 7 antenna steps within one data block –The second median filter determines an RFI flag to the data block centered within a window of multiple data blocks. Tv data only flag, Th data only flag, Tv-Th data flag After Filtering

7. Pulsed-RFI Statistics from GSFC Detector 7 Nov 12-13, 2008Piepmeier - SDT Meeting #1 Mean RFI for each of 22 flights Mean RFI for each of 378 11-minute legs RFI in each of 4.77M 20-ms samples Mean RFI for each of 8082 30-sec footprints ~10% of data has Pulsed RFI > 1K

8. Aggregate-RFI Statistics from UMICH ADD 8 Nov 12-13, 2008Piepmeier - SDT Meeting #1 ~10% of data has RFI > 1K (All flights)

9. CW RFI Statistics – UMICH ADD 9 Nov 12-13, 2008Piepmeier - SDT Meeting #1 NY City and surrounding ~1% of data has CW-type RFI > 1K

10. Non-Radar RFI Example: New York 10 Nov 12-13, 2008Piepmeier - SDT Meeting #1 Note: In band RFI!

11. Non-Radar RFI Example: New Jersey 11 Nov 12-13, 2008Piepmeier - SDT Meeting #1 Note: In band RFI!

12. WMTS: Rural Virginia 4876 community hospitals in CONUS (2004 US Census) Average ~1 hospital per SMAP footprint, but they will clump 12 Nov 12-13, 2008Piepmeier - SDT Meeting #1

13. Discussion Results –Radar interference about 10X worse than expected –CW-type interference about 1/10 occurrence-rate of pulsed-interference –CW-type interference concentrated in urban areas, but very strong SDT Help –Science Impact Level 2 Data loss requirement Issues with repeated denial-of-service in fixed locations? –Small working group to help How to extrapolate aircraft to satellite? Peer-review results 13 Nov 12-13, 2008Piepmeier - SDT Meeting #1