Aug 22, 2005 Email ------------------ E1300 tripped SCS 107 at 19:40:20 GMT. (03:40pm EDT, Monday Aug 22) Current pass is 19:50 to 21:05 GMT 13 errors in error log as expected Pre-approved CAP to disable SCS 29 is planned to be executed later during this pass. Aug 23, 2005 Email ------------------ Rates from the goes satellite indicate that the 4 million volt proton channel on ephin is about twice its trip limit. At the last pass, 0300 Greenwich time this morning, ephin protons and electrons were both above their trip limits. Ace soft protons are only about 5000, but are rising. Aug 24, 2005 Email ------------------ Ace soft proton fluxes are very high currently, about 50,000, but decreasing. The goes satellite proxy for ephin P4 shows just about at 1/3 the P4 trip level, so too uncertain to tell but the goes fluxes are also decreasing. Aug 25, 2005 Email ------------------ At 5PM EDT the GOES P2 (EPHIN P4GM surrogate) indicated that the EPHIN rate was likely to be below the 1/3 trip level. ACE P3 levels were somewhat elevated at ~40000 but dropping. Eric noted that there was an indication in the ACE and SOHO solar-wind data that the latest shock had just passed and we might expect the ACE P3 flux to fall more rapidly. The current P3 level if maintained for the entire orbit is higher than the bare ACIS fluence budget. However, the first 35ks of the orbit is HRC-S/LETG allowing some time for the ACE flux to drop before ACIS is exposed. The ACIS observations are 50ks bare ACIS followed by ~50ks ACIS/HETG and ~10ks bare ACIS to complete the orbit. The anticipated low-E proton exposure to ACIS was deemed acceptable. At the start of comm (21:15UT the EPHIN rates were all below the 1/3 trip level. Aug 25, 2005 Email ------------------ SCS-107 ran at 2005:236:22:38, one EPHIN sample after RADMON enable. We need data to see the cause but a single high EPHIN sample at the time of RADMON enable may be the culprit. The SCS-107 run occurred during an insertion of the LETG and as a result the insertion did not complete. The LETG potentiometer angle reads 44.21 degrees. A real-time procedure will be required to retract the LETG along with a flight software patch to reset a flag in the grating software before we can resume observing. Initial work on the development and test of the procedure will be performed overnight. Aug 23, 2005 SOT Report ----------------------- Significant solar activity: The solar flare activity level was high. Two M class events were recorded yesterday. (http://www.dxlc.com/solar/). Beside the two long duration M class events yesterday, there was another long duration C class today,and another C event in progress as of 12:27 UTC. CMEs reported for past two days: August 20-21: No obvious partly or fully Earth directed CMEs were observed. August 22: A complex CME event was observed after the M2.6 LDE early in the day. While most of the CME was observed over the southwest limb, contributions from disappearing filaments to the east of the flare source made this a full halo CME. A large CME was observed over the southwest limb following the major LDE event during the afternoon. Extensions over the eastern hemisphere were much weaker, however, it is still likely that Earth will receive some effects even from this CME. Aug 25, 2005 SOT Report ------------------------ LETG was successfully retracted tonight via CAP 976. Activity completed at 237:2357 GMT.