PALMER STATION SCIENCE SITREP August 1994 S-033 SURFACE UV IRRADIANCE AND PHOTOSYNTHETICALLY ACTIVE RADIATION VARIABILITY OVER ANTARCTICA. Catherine Gautier, University of California at Santa Barbara Personnel on Station: Paul Ricchiazzi, Bill O'Hirok In the first 10 days of our deployment (third week of September) most of our time was spent checking out our instrumentation and ironing out some small software configuration problems. During the third week of September we arranged for an ASA carpenter to build a platform for the GTR-100 on the roof of the T5 building. The installation went smoothly and data collection of daily SW irradiance began on 24SEP94. So far the instrument appears to be operating as expected. During the fourth week of September, we set up data analysis software on the Station PC network. The goal here is it to establish a simple facility with which to analyze the validity of the GTR and GMR outputs. Other work performed during this period involved preparations for the small and large scale albedo observations. S-091 PALMER IRIS SEISMOLOGY. R. Butler/G. Holcomb, U.S. Geological Survey, Albuquerque, NM No personnel were on station. The system has been monitored by the station science technician. Data acquisition software was reloaded into the DA computer on September 07 to restore N-S data streams that had stopped updating several days earlier. Heat trace was installed in the bottom of the DA rack in an attempt to remedy the reoccurring problem with the N-S data streams. On August 12, a new vacuum was pulled on the bell jars of both horizontal seismometers, after it was found that both were nearly up to atmosphere. S-106 VERY LOW FREQUENCY (VLF) REMOTE SENSING OF THUNDERSTORM AND RADIATION BELT COUPLING TO THE IONOSPHERE. U. Inan, Stanford University. No personnel were on station. On September 04 the antenna line running up the glacier was inspected, and heavy icing was removed from the cables. In several places the messenger wire had fallen off the support posts and was reattached. On September 28, an additional mode of data collection was started: 1/15 synoptic recording of broadband data on 1/4" analog tape. S-254 CHLORINE- AND BROMINE-CONTAINING TRACE GASES IN ANTARCTICA. R.A. Rasmussen, Oregon Graduate Institute for Science and Technology. There are no personnel on station. Air samples are taken on a weekly basis by the station physician. The samples are returned to the Institute for analysis of a number of trace components, especially chlorine- and bromine-containing gases. These elements have been implicated in the chemical processes that contribute to the austral-spring depletion of the ozone layer over Antarctica. This work will contribute to a better understanding of the buildup of trace constituents, particularly those of high-latitude marine origin. S-257C COLLECTION OF ATMOSPHERIC AIR FOR THE NOAA/CMDL WORLDWIDE FLASK SAMPLING NETWORK. James T. Peterson, Palmer Station, Environmental Research Laboratories, National Oceanic and Atmospheric Administration. There are no personnel on station. Air samples are taken on a weekly basis by the station physician. The National Oceanic and Atmospheric Administration (NOAA) Climate Monitoring and Diagnostics Laboratory team continue long-term measurements of trace atmospheric constituents that influence climate. The Palmer Station air samples are returned to the NOAA laboratory for analysis of trace constituents, including carbon dioxide. These measurements are part of NOAA's effort to determine and assess the long-term buildup of global pollutants in the atmosphere. These data will be used to determine how the rate of change of these parameters affects climate, particularly by including them in climate model studies. S-275 UM/DOE-EML REMOTE ATMOSPHERIC MEASUREMENTS PROGRAM. J. Prospero/T. Snowdon, University of Miami; C. Sanderson/N. Chui, EML/DOE N.Y. No personnel were on station. The system has been operated by the station science technician. One sample filter was exposed for the duration of each week, and a weekly schedule of calibration, background, and sample counts was maintained. S-293 OZONESONDE MEASUREMENTS OF STRAOSPHERIC OZONE OVER ANTARCTICA. Arnold L. Torres, Goddard Space Flight Center/ Wallops Flight Facility. Personnel on Station: George B. Brothers, E. Charles Seman Arrived at Palmer Station late Sunday afternoon 4 September. Proceeded the next four days to erect balloon shelter. Some Supplies, including tent parts which were left behind in 1990 were not to be found so with the help of Palmer staff, substitute parts were manufactured. As balloon shelter was being erected, we also began to get our calibra- tion lab in working order. Payload preparations and calibrations were completed for a few sondes and with several test launches, had a success- ful radiosonde launch on 15 Sept. Had flights with useful data on 20, 22, 24, 27, 29 of September. The flight on 30 Sept. has about 40 minutes of missing data, but not at the critical portion of the flight and can probably be used. Are still encountering problems receiving flight Data. Wallops personnel and factory engineers from VIZ continue to evaluate the information pro- vided by the field team and flight journals and progress is being made to resolve the problems. In October launches are planned in three day segments, weather prevail- ing, with one off day between each three day segment. T-312 TERASCAN SATELLITE IMAGING SYSTEM. R. Whritner, Scripps Institute of Oceanography, La Jolla, CA. No personnel were on station. The system has been operated by the station science technician. DMSP and NOAA telemetry were collected, processed, and archived. DMSP infrared telemetry was examined on a daily basis for clear conditions in the Amundsen and Bellingshausen Seas and in the vicinity of Palmer Station. Throughout the month IR images were sent to Marine Operations in Denver. Problems with data transfer prevented any images from being sent from September 21 through the end of the month. Several ozone concentration maps were produced to support local science on station. On September 13, the AVHRR sensor failed on the NOAA-11 spacecraft. Two scheduled passes were lost before the problem was discovered, but subsequent passes were scheduled using other available NOAA satellites. During the month, software changes were made to allow data collection from the new DMSP satellite, F-12. T-313 UV MONITORING EXPERIMENT. C. Booth, Biospherical Instruments, Inc. No personnel were on station The system has been operated by the science technician. Throughout the month, raw irradiance data were collected daily and transmitted to BSI, and preliminary irradiance data were produced in support of Science. Absolute calibrations were performed on September 10 and on September 24. High voltage levels were adjusted to account for increasing brightness, and data scans were added at 0900Z, 1000Z, and 2300Z. 03074711.76B PLM078.OCT