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Дата изменения: Fri Apr 4 21:10:42 1997 Дата индексирования: Thu Feb 27 23:55:48 2014 Кодировка: Поисковые слова: dust |
NOTE: The next meeting is April 2, 8:30 AM. STATUS REPORTS 1. Observatory Status - All subsystems nominal On Saturday, the FGS-1R Servo A moved by a "couple of tenths" of a degree then came right back. The event occurred during SAA - Level 1. It is being investigated further. The K-factors resulting from the 7026 activities (FF3 optimization) may require SMS edits if they are needed for the SMS097 in which the FGS1R guide star acquisition test is performed. However, no one at the meeting believed this was the case; it will be verified later today. 2. WFPC2 Status - Proceeding nominally with Cycle 6 science and remaining SMOV monitors. 3. NICMOS Status - Engineering Status - Following the 7042 Fine Alignment activities on Friday, the Filter Wheels were reconfigured to the nominal pre-positioning (FW1=F110M, FW2=FW3=F160W). The SI was then reconfigured to BOOT Mode, per Friday's plan, to eliminate susceptibility to SAA SEUs. A set of PSTOL procedures designed to collect diagnostic data on filter wheel rotations have been developed and are planned for execution some time after the associated FRR scheduled for 1 pm today. The Detector temperature is 60.82 degK and the VCS temperature is 98.1 degK. - Science Status - As a result of Chris Burrows' analysis of the fine alignment data (7042), the camera 3 focus is seen to have moved, in detector space, an additional 0.17 mm, (+/- 0.06) in the 1-week interval between intermediate alignment (7135) and 7042. This indicates a significantly slower expansion rate compared to previous weeks. Other techniques give essentially the same result. For instance, Marcia Rieke's analysis of the FWHM of total counts indicates an upper limit for C3 motion in PAM space of ~ 0.9 mm. Also, dark frames taken during 7054 have been compared to darks from Thermal Vac testing and show no significant on-orbit radiation damage. Thoughput checks using data from 7042 tend to confirm last week's report of low thermal background from the HST OTA. Gerry Repass requested that, if the NICMOS team plans to uplink final PAM position commands prior to the SMS-provided opportunity Thursday evening, they inform him of the desired uplink time by 11 am today. 4. STIS Status - Engineering Status - Over the weekend, a CCD motor temperature went slightly out of limits low. The low limit is set at 15 degC. This is not unexpected, since the CCD is running slightly cold with the MAMA LVPSs off. Also, given that safing limit is 0 degC, it was decided to change the lower limit to 10 degC. - Science Status - Nominal. The first STIS ERO (NGC 4151 slitless spectrum) was observed and appears to be an impressive success. Stefi Baum reported that it displays detailed, filamentary, multiple emission-line images. The second iteration of the target acq test (7067) occurred Sunday night. There were no results to report at this meeting. The CCD UV monitor (7063) was executed again and results are being analyzed. 5. FGS status - See new activities. 6. FOC/COSTAR status- no new activity. PLANNING REPORTS 1. Status of Upcoming SMSs - SMS090 - Currently executing. - SMS097 - Initial Mode products are out for review. - This calendar also will include additional focus monitoring activities. - SMS104 - Has been built. SARs went out for negotiation over the week-end. Initial Mode products to be issued later today. - Contains 24-hour gaps as opportunities for FSW installation for SAA avoidance management. - Will require a "10.2 commanding update for NICMOS SAA avoidance and for STIS CCD annealing process. This update is on schedule. The annealing proposal (7107) will go in this SMS. - SMS111 - 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. 2. Archive - Nominal. There is an outstanding question regarding one observation of 7063 (STIS CCD UV Monintor) that has still not made it into the archive.