Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.stsci.edu/smov/notes/0402smov.html
Дата изменения: Fri Apr 4 21:10:43 1997 Дата индексирования: Thu Feb 27 23:55:51 2014 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п п п |
NOTE: The next meeting is April 4, 8:30 AM. STATUS REPORTS 1. Observatory Status At 090/2341z, the spacecraft entered Software Sunpoint Safemode when SADE-2 was powered off having failed a solar array wing torque test. Details of the safing event, its chronology, and the Health and Safety rocovery plans can be found in a separate MOSES handout from the April 1 morning telecon. The observatory is currently running under control of the Health and Safety load until 1pm today at which time the reconstructed science SMS (sms092) will resume SMOV/science operations. SMOV activities impacted by safing were a WFPC2 UV monitor, STIS ERO 7122, and several WFPC2 and STIS internals and some WFPC2 flat fields. The STIS ERO has been rescheduled in the SMS092. Other than the loss of these internals and flats, there is no other SMOV impact, other than the time lost to SMOV SMS prep work on the part of people drawn off to work safemode recovery. A realtime solar array aliveness test was run yesterday to gather SADE2/SA diagnostics and to qualify it for return to normal operations. The aliveness test was reported as nominal. The 6-degree test slew resulted in a position error of 3 degrees. This result was reported as acceptable. At end of the slew, the wing-fail flag was set, but, as it has been seen before on SADE 1 & 2, it is also considered nominal. 2. WFPC2 Status - Proceeding nominally with Cycle 6 science and remaining SMOV monitors. A UV monitor observation and some interals and flats were lost to the safing event. 3. NICMOS Status - Engineering Status - NICMOS remained in Boot mode, as planned, during the safing event. The Buffer Box 2 temperature was reported out-of-limits-low at -12.1 degC. Reason is under study; most likey related to safing attitude. The Detector temperature is 60.86 degK and the VCS temperature is 97.66 degK. A realtime Filter Wheel (FW) test was run yesterday to gather diagnostics on the FW-motion "retries" experienced during NICMOS 7042 last week. The test resulted in a repetition of the retries similar to those experienced in 7042. There were 15 retries out of a total of 45 FW motions. All retries involved travel to the Camera 2 F180M position. All retries involved no more than 2 steps and the instrument did not suspend. More filter wheel tests are planned for today; the exact time is TBD, pending some script/PSTOL updates. - Science Status - Nothing new to report. At this point, there is no near-term change identified for the NICMOS SMOV program. The uplink of the PAM default positions following fine alignment analysis may involve only Camera 3; the default positions for the other two cameras needing no change. The details will be verified off-line. The first NICMOS ERO is now scheduled for 094/0206z. Further focus monitoring is scheduled to start at 095/0015z. 4. STIS Status - Engineering Status - Instrument is in Hold with CCD at -83 degC. The safe- mode has more or less the effect of an annealing episode, but darks to monitor changes are not scheduled until Sunday night. - Science Status - Nominal. The second iteration of the target acq test (7067) has been analyzed and, while the acq was successful, the offset to be applied in going from a filtered aperture to an unfiltered slit was not verified. Nevertheless, the target was centered in the slit to ~ 0.7 and ~ 0.3 pixels in the two axes, which is good. For the first time, a "handful" of hot pixels were observed in the target acquisition check box. The pixels were reported to Commanding for update prior to the 3rd scheduled acq test, eventhough the safing has probably removed the hot pixels. The most recent CCD UV monitor (7063) has been analyzed and the results again show no change, although the switch to a new star has added another 1% error (for a total of 2%). 5. FGS status - No new activities. The K-factors resulting from the 7026 activities (FF3 optimization) require SMS edits since they have been determined to be desirable for SMS097 in which the FGS1R guide star acquisition test is performed. These edits are being performed by SPSS. 6. FOC/COSTAR status- The FOC SMOV program has been reported to the SMOV TTRB as complete. The planned PDB SIAF update probably won't be necessary. The SMOV TTRB has enabled the resumption of FOC science. PLANNING REPORTS 1. Status of Upcoming SMSs - SMS092 - Science intercept SMS scheduled to start at 1 pm today. It is delivered and signed off. - This SMS has been built with the new SAA Operate stated defined for NICMOS SAA operations. Since this upgrade was ready, it was included here and in the SMS097, instead of the planned SMS104. It was noted that this state does not protect against the dewar heater set point corruptions experienced last week. Such corruptions, which result in unplanned dewar heater turn-ons, must be dealt with in realtime. - An updated MEGG run will be provided starting with this SMS. - SMS097 - Has been rebuilt to include the NICMOS SAA Operate state. It will also be edited to include the K-factor updates mentioned above in the FGS status report. Final Mode products are therefore not expected before Thursday. - This calendar also will include additional NICMOS focus monitoring activities (7150). - SMS104 - Has been built. A continuity run vs. the rebuilt 097 has been completed. Gaps for FSW configuration opporunities related to MAMA SAA-avoidance management are on days 105 and 110. - The CCD annealing proposal (7107) goes in this SMS. - SMS111 - Calendar is being built. The current plan is to include the MAMA turn-on (7105 revised) in this SMS. This test must first be run against the BRZ. The STIS team will talk off-line regarding regression test plans. Depending on the way the calendar maps out, this SMS may need to be broken into a pair of 3- and 4-day SMSs. 2. Replans STIS - MAMA HV Turn-on (7105) is currently planned for SMS111. Downstream MAMA scheduling is being assessed. NICMOS - No significant replans have yet been identified. OPERATIONS STATUS 1. OPUS - Nominal. Parameters for the Re-use Target Offset in NICMOS proposal 7150 are needed from the NICMOS team by Thursday afternoon. 2. Archive - Nominal. The outstanding question regarding one observation of 7063 (STIS CCD UV Monintor) that has still not made it into the archive has been resolved and is being processed.