Accession Number : ADA305819

Title :   Ground Cloud Dispersion Measurements During the Titan IV Mission #K23 (14 May 1995) at Cape Canaveral Air Station. Volume 1 - Test Overview and Data Summary.

Corporate Author : AEROSPACE CORP EL SEGUNDO CA TECHNOLOGY OPERATIONS

PDF Url : ADA305819

Report Date : 27 FEB 1996

Pagination or Media Count : 199

Abstract : Launch plume imagery, airborne and ground-level HCl measurement results and meteorological data determined during the launch of a Titan IV vehicle at Cape Canaveral Air Station (CCAS) on 14 May 1995 (mission #K23) are presented. These data will be used to determine the accuracy of the Rocket Exhaust Effluent Diffusion Model (REEDM). The imagery and aircraft-based HCl measurements indicate that the plume separated into ground-cloud and launch-column segments below and above 2000 meters, respectively, that took northeast and southeast trajectories out to sea consistent with rawinsonde data. The ground cloud's stabilization height was twice that predicted by REEDM. Of numerous deployed dosimeters, large HCl responses (greater than or equal 100 ppm-min) were obtained only for dosimeters on four lightning towers surrounding the pad and at a southeasterly position on the perimeter fence 180 meters away. REEDM predicted that a low-level inversion layer would prevent the cloud from diffusing back to ground. Aircraft HCl measurements briefly performed at altitudes as low as 400 meters 50 min after launch and 16 km from the pad detected only low levels (0.1-0.5 ppm) of HCl.

Descriptors :   *REENTRY VEHICLES, *METEOROLOGICAL DATA, *DISPERSIONS, STABILIZATION, STATIONS, GROUND LEVEL, CLOUDS, MEASUREMENT, DEPLOYMENT, DISPERSING, AIRCRAFT, LAYERS, WIND, ACCURACY, TOWERS, LIGHTNING, LOW LEVEL, INVERSION, RADIOSONDES, SURFACE TO SURFACE MISSILES, HEIGHT, DOSIMETERS.

Subject Categories : Meteorology
      Guided Missile Reentry Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE