Accession Number : ADA293219

Title :   Multiple Instrument Studies of Chemical Releases and Heating at Arecibo.

Descriptive Note : Final rept. Jul 90-Sep 93,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Livingston, R. C. ; Heinselman, C. J. ; Vickrey, J. F. ; Tsunoda, R. T.

PDF Url : ADA293219

Report Date : MAR 1994

Pagination or Media Count : 44

Abstract : The Combined Releases and Radiation Effects Satellite (CRRES) Puerto Rico experiments carried out during June and July 1992, provided and opportunity to observe the dynamics and evolution of high-altitude chemical releases at middle latitudes. Among the experiments that were conducted for the program, three large barium payloads were released into the dawn F region -- two into the natural ionosphere and one into an ionosphere modified by HF heating. Extended periods of HF modification prior to the rocket launches also provided an opportunity to study heating effects, per se. This report reviews some preliminary results from three participating instruments: (1) ion-line mapping made by the Arecibo incoherent scatter radar, (2) HF backscatter characterization and tracking of the barium cloud, and (3) transionospheric propagation diagnosis of large and medium scale structure produced by heating and the barium releases. The data that are reviewed are primarily observational and are presented with a minimum of physical interpretation. Recommendations are made for further analysis of much of the data. jg

Descriptors :   *CLOUDS, *HEATING, *RELEASE, *INSTRUMENTATION, *INCOHERENT SCATTERING, *BARIUM, DATA PROCESSING, HIGH FREQUENCY, PAYLOAD, CHEMICALS, DYNAMICS, TRACKING, RADAR, BACKSCATTERING, SCALE, ARTIFICIAL SATELLITES, HIGH ALTITUDE, DIAGNOSIS(GENERAL), F REGION, RADIO WAVES, RADIATION EFFECTS, SCINTILLATION, ROCKET LAUNCHING, TEMPERATE REGIONS, TWILIGHT, IONOSPHERIC PROPAGATION, PUERTO RICO, HYDROGEN FLUORIDE.

Subject Categories : Inorganic Chemistry
      Atmospheric Physics
      Physical Chemistry
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE