HUBBLE SPACE TELESCOPE DAILY REPORT #902 PERIOD COVERED: 0800 EST 06/04/93 - 0800 EST 06/05/93 Daily Status Report as of 156/1200Z. 1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED: 1.1 Uplinked Updated Ephemeris Tables, Per MOSES 2871 1.2 Completed FOS/BL 3616 (The Upper Atmosphere of Uranus and Neptune) The Faint Object Spectrograph was used to make far ultraviolet observations of the upper atmosphere of the planet Uranus to study its molecular hydrogen emissions. The onboard target acquisition was successful. Sixteen spectral observations were received and displayed. They were reported to be okay. Some of the final observations were reported to have an occasional recentering event. 1.3 Completed WFC/PC 4109 (WF/PC Cycle 2 Calibration: Rapid Internal Monitor) Both the Planetary Camera and the Wide Field Camera were used to make internal flat calibration images with filter F555W to check for daisies and measles (i.e., new forms of contamination), and the return of quantum efficiency hysteresis. The observations were executed as scheduled, and no problems were reported. 1.4 Completed Three Sets of FOC/96 4804 (UV Imaging of Nearby Galaxies with FOC/96) The Faint Object Camera (f/96) was used to make one ultraviolet image of the nearby galaxy ESO-1327-1. The exposure was ten minutes long, and used filter F220W. The observation was monitored, and the data was received and displayed. The data was reported to look normal. 1.5 Completed WFC 4277 (Calibration of Nearby Galaxies Type IA Supernova as Standard Candles) The Wide Field Camera was used to make two images of the galaxy NGC-5253 to study Cepheid variable stars located inside the galaxy. These stars can be used to determine the distance to the galaxy. Both observations were monitored in the OSS. Both images were reported to look normal. 1.6 Completed FOS/RD 3887 (Integrated Dynamical and Spectroscopic Observations of Jupiter) The Faint Object Spectrograph was used to make several spectral observations of the planet Jupiter at different latitudes along its central meridian to study its atmosphere. Observations were made at the equator, and at latitudes of 5, 12, 48, 25, and 33 degrees. The observations were monitored in the OSS, and no problems were reported. 1.7 Completed WFC/PC 4207 (WF/PC Cycle Calibration: Photometric Calibration Monitor) Both the Planetary Camera and the wide Field Camera were used to monitor the ultraviolet flux from standard star BD+75D325 and the cameras throughput was monitored. The observations were displayed in the OSS, and they were reported to look normal. 1.8 Completed HSP/VIS 4569 (A Search for Microflaring Activity in Dwarf M Class Stars - Cycle 3) The High Speed Photometer was used to make two observations of the M class dwarf star AGK+81D266 looking for microflares which have short durations and occur with numbers inversely proportional to the flares energy. Both observations were received in real time. The data indicated that the target acquisition was successful. The science observations occurred during LOS. After the science tape recorder playback, they were reported to look normal. 1.9 Completed WFC 4381 (HST Medium-Deep Survey - Cycle 3) The Wide Field Camera was used to make one high latitude medium deep sky survey image taken in parallel with the prime science observations. The observation was received and displayed in the OSS. It was reported to look normal. 1.10 Completed WFC 4348 (Long Period Variables of M81: Cycle 3 Medium) The Wide Field Camera was used to make two images of the galaxy NGC-3031 (aka, M-81) to look for long-period variable stars. The observations were monitored and displayed in the OSS. They were reported to look okay. 1.11 Completed PC 3603 (Snapshot of Protoplanetary Nebulae) The Planetary Camera was used to make two snapshot images of the protoplanetary system V354-LAC To study its current morphology. The observations were received and displayed in the OSS. They were reported to look okay. 1.12 Completed FOC/96 4353 (Hubble Space Telescope Imaging of IO: Cycle 3 High ) The Faint Object Camera was used to stud Jupiter's moon Io, to make ultraviolet and visible images in order to determine the abundance and distribution of surface and atmosphere constituents, particularly sulfur dioxide. The dark calibration observations was executed on gyros, and the other observations were executed in fine lock. No problems were reported. 1.13 Completed HSP/UV2 4307 (Radial and Non - Radial Pulsations in Hot White Dwarfs - Cycle 3 Medium) The High Speed Photometer was used to make ultraviolet observations of the Hot (120,00 to 140,000 Deg. K.) white dwarf star PG1159-035 which is known to exhibit non-radial pulsations. The observations were executed as scheduled, and no problems were reported. 2.0 FLIGHT OPERATIONS SUMMARY: 2.1 Guide Star Acquisitions: Scheduled Acquisitions : 24 Successful : 23 157/0734Z, Failed the acquisition of the designated guide star for FGS 1&3, Failed Fine Lock. Scheduled Reacquisitions : 15 Successful : 15 Losses of Lock : 0 2.2 FHST Updates: Scheduled : 20 Successful : 20 2.3 Significant HSTARs: None 2.4 Operations Note: None 3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD: 3.1 Complete WFC 5010 (Determination of the Extragalactic distance Scale. III. M-101) 3.2 Complete FOC/96 4804 (Ultraviolet Imaging of Nearby Galaxies FOC/96) 3.3 Complete PC 3982 (Physical conditions in the Narrow - Lined Region) 3.4 Complete GHRS/2 4927 (GHRS SSA Peakup test - Part 1) 4.0 ANOMALY STATUS: 4.1 Significant New Anomalies: None 4.2 Significant Unresolved Anomalies: None 5.0 SIGNIFICANT FORTHCOMING EVENTS: Flight Software --------------- An installation of version 9.0 of the DF-224 flight software is planned for June 9-10. This will be the first time a complete new DF-224 version has been installed on the spacecraft since launch. A successful pre-Flight Readiness Review for this installation was held last week. Final testing of the 9.0 release is under way in the VEST and DSTIF. Additional communications requirements are being coordinated with the NCC. /DMH -END-