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Дата изменения: Tue Mar 11 23:59:25 1997 Дата индексирования: Thu Feb 27 23:54:43 2014 Кодировка: Поисковые слова: annular solar eclipse |
STATUS REPORTS 1. Observatory Status MOSES status reports: - PCS - There was guide star failure during the NICMOS 7134, caused by the fact the select guide star turns out to be a binary. This star is also used in the subsequent NICMOS alignment activity (7041) in the SMS069. It was agreed that the SMS will be rerun with the K1 and K3 factors edited to produce the effect of a lowered detection threshold, in an effort to lock on to the star. - All other observatory subsystems all nominal 2. WFPC2 Status - Engineering status is nominal. - Science status - nominal. The next UV throughput measurements are scheduled for this evening,as are the WFPC2 EROs and the resumption of Cycle 6 science. 3. NICMOS Status - Engineering status - The instrument experienced another SAA-induced transition to SUSPEND state about an hour before the start of this meeting. The event, occurring on Detector 3, has the same signature as the previous anomalies. The memory dump, per procedure, is expected shortly. Plans for proceding to the next NICMOS activity, which is scheduled for March 11, will be determined after more analysis of this event, and will be discussed at this meeting tomorrow morning. Yesterdays's Pre-alignment Check-out (7134) produced nominal PAM motions, with the PAM motor temperature peaking at around 30 degC. However, there were some brief PRS limit violations caused by noise introduced into the temperature monitors on the other motors. These are to be expected; HSTARs were written. - Science status - the Pre-Alignment Check-Out (7134) produced the first NICMOS "engineering assessment frames." The activity successfully verified correct postarg polarities as well as the assumption, with only very small residual, of 3.6 acrseconds of spacecraft motion per millimeter of PAM defocus. The activity also verified assumptions regarding exposure times and camera aperture locations (correct to within 2 arcseconds). The guide star failure, reported above, defaulted to one- guide-star onctrol for the camera two data, but the resulting loss of roll-control had no effect on the quality of the data. The guide star failure resulted in no acqui- sition at all for the Camera 3 observations, but, since the drift produced smearing of only ~ 1/5 to 1/4 pixel, the data are still valid. Therefore, the guide star problem had no effect on the results of this activity, nor should it in the upcoming 7041, in case of failure again there. This activity produced images as the PAM swept throogh focus in all three cameras. The Airy rings in cameras 1 & 2 are as expected. Now the team will proceed with more quantitative analysis, but as of now, they "like what they see." 4. STIS Status - Engineering Status - Nominal and unchanged - The MAMA LVPSs remain off indefinitely, pending further investigation by BASD. CCD radiator temperatures are running a few degrees warmer now, possibly because of the increase in average sun angle now that the BEA period is past. - Science Status - Data from STIS internal observations continue to be analyzed with updates expected for the CCD bias values and aperture centers. The MSM positons may not need updating. Some SMOV activities will likely need to be repeated in some way. These include some CCD flats, which were previously saturated, the MSM tests (7081, 7083) which may be affected by LVPS-induced temperatures, and a new proposal may be required to test the thermal effects of a 12-hr on/off cycling of the LVPS. The first execution of the CCD UV monitor (7063) is not usable because the pre-alignment offsets placed the star at the edge of the 6x6 arcsec aperture. The plan for subsequent visits in this proposal is to use a SIP on March 9 to center the target in the aperture and to provide a PDB SIAF update for the SMS072 in which the next visit occurs. 5. FGS status - no new activity 6. FOC/COSTAR status- no new activity PLANNING REPORTS 1. Status of Upcoming SMSs - SMS062 - Currently executing. - SMS065 - Signed off, ready for uplink. - SMS069 - Final Mode products are out for review. - SMS072 - Rebuilt without the NICMOS 7036 mentioned above. - Final mode products are expected in ~ 1 day. - SMS076 - Being reworked to include: -- FGS ITS fix, which had failed on the SMS062. -- NICMOS 7135 modifications to avoid SAA orbits. -- PAM motion spacings to reduce motor heating. - SMS079 - Being reworked to include: -- NICMOS 7054 SAA avoidance 2. Replans -None OPERATIONS STATUS 1. OPUS - Will prepare/support of unscheduled SIP on Mar. 9 to recover STIS 7063 target mentioned above. - Some NICMOS files went to trouble, last evening. Problem is understood. In the meantime, data has been FTP's to IDT. 2. Archive - For some observations, OPUS populated the association level keywords for non-associated STIS data. This confused the HDA and the REFERENCE file info for those observations only was lost from the database tables. OPUS has fixed the problem and we are working on fixing the tables.
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