1. Flight Software Image Compression and Status Dennis Wang Interferometrics/NRL SECCHI Flight Software Lead Paris Mar 5-9, 2007

2. 030702SECCHI Tiger Team Image Processing FSW 5.01.05 has 129 different possible image processing steps –Image Compression –Rice –H-compress (12 sets of parameters) –ICER (12 sets of parameters) –Binning –Arithmetic (SQR, DIV2, DIV3, DIV4, Poisson Recoding, 32bit->16bit) –Exposure Adjustment –CME Detection –HI high/low word compression –SSR1, SSR2, SWB, Realtime channel selection

3. 030702SECCHI Tiger Team ICER Wavelet Image Compression by JPL used by the Mars Exploration Rover Features –Ability to set byte quota –Segmented to curtail data loss in event of packet loss –Better error characteristics than H-compress –More CPU time than H-compress or Rice –Capable of lossless compression

4. 030702SECCHI Tiger Team COR1 ICER at Launch

5. 030702SECCHI Tiger Team COR2 ICER at Launch

6. 030702SECCHI Tiger Team EUVI & COR1Space Weather Beacon

7. 030702SECCHI Tiger Team COR2 Space Weather Beacon

8. 030702SECCHI Tiger Team HI-1 Space Weather Beacon

9. 030702SECCHI Tiger Team HI-2 Space Weather Beacon

10. 030702SECCHI Tiger Team Space Weather Beacon TelescopeCadenceImage Processing Image size TM/hour (kB/hr) 144 kB/hr avail EUVI6 195/304 pairs per hour 128x128 IC11 6.5kB 78 COR11 per hour128x128 IC11 6.5 kB 6.5 COR24 per hour256x256 IC10 10.5 kB 42 HI-11 per 2 hours (odd hour) 512x512 IC11 6.5 kB 3.25 HI-21 per 2 hours (odd hour) 512x512 IC11 6.5 kB 3.25

11. 030702SECCHI Tiger Team Image Processing Commissioning Image processing –Image summing (sum 3, 4 or 5 images onboard) –CME detection algorithm and testing –Different threshold table for A and B –Actual COR2 images used to generate threshold table –Masking of threshold table –Lossless image and same image via SWB or ICER –Tested Disabling of SSR2 twice –Total Brightness SWB COR1 and COR2 images for SWB –HI space weather (32 bit -> 16 bit conversion)

12. 030702SECCHI Tiger Team Image Scheduling Commissioning Image Taking and Processing Experiments –EUVI 10sec cadence sequence of 60 images –Inflight Rice and ICER compression images Image Scheduling –Light travel time table –ATS and RTS Schedule blocks

13. 030702SECCHI Tiger Team FSW Bugs and Enhancments since Launch –FSW 5.01.05 –Image Processing - HI high/low word compression –Header image dimensions for CCD-binned, trimmed image fixed –FSW 5.01.00 –HI cosmic ray scrub –use photon noise as 1 sigma and adjust scrub in sigma –Choose 1,2,3,4 or 5 sigma as scrub criteria –HI Cosmic Ray Report relocated to end of image –Simultaneous HI and SCIP image taking

14. 030702SECCHI Tiger Team Issues and Requests 3/1/2007 synoptic schedule with 7476 exposures is skipping images, smaller schedule with 5487 exposures seems to be OK –Cadence too fast ? –CPU overloaded ? –Campaign mode limit ? 1/25/2007 SECCHI-A rebooted –Watchdog timer –38 days since power-on –Manual Recovery at next pass Photon Transfer curve readout tables –Needs work –1088x1024 image –2176x2048 image

15. 030702SECCHI Tiger Team Enhancements On-board composite images –Save TM by modifying IP to make composite images –EUVI thumbnails in COR1 or COR2 corners ? –EUVI thumbnail in COR1 occulter ? Image processing –Only 20 image processing steps per image –Only 100 rows in the image processing table Low TM rate Operations