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NAVAL RESEARCH LABORATORY (NRL) SPACE SCIENCE NEWS DIGEST

 NAVAL RESEARCH LABORATORY (NRL) SPACE SCIENCE NEWS DIGEST
 New Radioactivity from Star Explosion Discovered
 NRL's Oriented Scintillation Spectrometer Experiment (OSSE) on NASA's Compton Gamma Ray Observatory has detected large quantities of radioactive cobalt-57 in the remnant of a star that exploded in 1987. The OSSE project scientists say that this discovery has confirmed an earlier theory suggesting that most of the mass-57 isotope of iron in the universe had an origin in supernovae explosions.
 Joint U.S./Russian Space Experiment Data to Be Studied
 During the next few weeks, scientists at NRL will begin analyzing data from a joint U.S./Russian experiment that was conducted to study the distribution of the cosmic-ray-produced isotope Beryllium-7 (Be-7). Aluminum foil used in space to collect the Be-7 isotope was returned to Earth in early September and is expected to arrive at NRL this week. The experiment, which was launched mid-August, is a follow-up to the discovery of unusual amounts of Be-7 on the surfaces of the Long Duration Exposure Facility spacecraft, which was brought back from space in 1990.
 Camera System Developed to Map Earth Features from Space
 A new NRL system, which attaches to a modified Nikon camera and uses a geolocation process, will allow shuttle astronauts in space to point a still camera at an interesting feature on Earth, record the image and determine the latitude and longitude of the feature. The system, called HERCULES (Hand-held, Earth-oriented, Real-time, Cooperative, User-Friendly, Location, Targeting and Environmental System), is scheduled to fly in November on space shuttle flight STS- 53.
 Instrument Developed to Monitor Weather on Global Scale
 NRL scientists have completed the development and fabrication of optical instrumentation for a remote sensing system that is expected to obtain data on space weather conditions on a global scale. The Remote Atmospheric and Ionospheric Detection System (RAIDS), which is scheduled to fly aboard NOAA's TIROS satellite in June 1993, is a proof-of-concept experiment that will measure naturally occurring ionospheric emissions and provide data on ion and neutral atmospheric constituents on both the day and night sides of the Earth. Spectrograph Being Developed for Defense Meteorological Satellites
 Space scientists and engineers at NRL are developing an optical remote sensing system that will launch aboard Defense Meteorological Satellite Program weather satellites in the late 1990s to provide long-term upper atmospheric data. The Special Sensor Ultraviolet Limb Imager (SSULI) is an Earth limb-imaging spectrograph that will measure high-altitude ionospheric and thermospheric airglow profiles in the far- and extreme-ultraviolet wavelengths. DOD will use these profiles to improve high-frequency communications and other systems that use the ionosphere for propagation.
 Instrument Developed to Study Chemical Processes
 in Earth's Atmosphere
 The NRL-developed Middle Atmosphere High Resolution Spectrograph Investigation (MAHRSI) is an ultraviolet spectrograph designed to obtain data, from space shuttle platforms, that will help scientists gain a better understanding of the processes that create and destroy ozone in the atmosphere. MAHRSI is scheduled to fly in June 1994 on the CRISTA/SPAS mission and will then be integrated into NASA's ATLAS series, beginning with ATLAS 4.
 NOTE: To obtain copies of press releases on these topics, call the contact below.
 CONTACT: Janice Schultz of the Naval Research Laboratory, public affairs branch, 202-767-2541, or fax, 202-767-6991.
 -0- 10/21/92


CO: Naval Research Laboratory ST: District of Columbia IN: ARO SU:

MH -- DC001 -- 2705 10/21/92 09:09 EDT
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Date:Oct 21, 1992
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