The high proton counts occurred following passage of an interplanetary shock wave due to a halo coronal mass ejection associated with two X-class solar flares on 6 June. Jun 08, 2000 Shift Report -------------------------- From real-time data at AOS (160:1120) it was determined that the RADMON safing action had taken place and SCS 107 had been run to safe the instruments. Indications of this were: - S/C downlink telem had to be commanded on from ground - SIM was at HRC-S posn (-99615) - ACIS science was idle - SCS 107 was Disabled and at step 107 The only issue with SCS107 was that the HETG had NOT retracted as expected. This was due to the fact that SCS 107 has not yet been patched to use MCE-B. The fact that the HETG is in is not a problem for now although the reason for its not retracting must be understood prior to starting another load. Both ACIS and HRC have been safed correctly per procedure. HRC will have to run CAP 613 again at some point to move the door back to the 10,000 step open posn. Jun 09, 2000 Shift Report ------------------------- This was our second attempt today to start the CTI measurement after this large solar event. At the earlier pass (160:20:45), the EPHIN P4 rate was fluctuating between 1600-1850 cts/sample. I decided that was too high to start the CTI measurement. At the beginning of this pass, the EPHIN P4 rate was 667 cts/sample. ACE rates have shown a slow, steady decline from 80,000 to 50,000 particles/cm2-s-ster-MeV.