Accession Number : ADA291209

Title :   The Scanning Fast Field Program (SCAFFIP) General Version 1.0. User's Manual.

Corporate Author : ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM

Personal Author(s) : Noble, John M. ; Marlin, Dave

PDF Url : ADA291209

Report Date : JAN 1995

Pagination or Media Count : 128

Abstract : The Scanning Fast Field Program (SCAFFIP) is an atmospheric acoustic propagation model incorporating many of the effects on the environment on the sound field such as geometrical spreading, refraction, diffraction, molecular absorption, and complex ground impedance. SCAFFIP provides attenuation levels with range and azimuth or sound pressure levels in dB (re: 20 mu Pa) with range and azimuth for a given geometry, frequency, and meteorological profile. The meteorological profile and the geometry provides the model the ability to calculate the sound speed profile. The geometry profile is required because the angular dependence of the sound speed on the wind direction is relative to the direction of propagation. This model works over a flat-earth and a non-turbulent atmosphere. Even with these restrictions, the model performs very well for many scenarios. The model contains a friendly user interface requiring a minimum amount of information to run the model. There are also flags that can be set to obtain more detailed information.

Descriptors :   *COMPUTER PROGRAM DOCUMENTATION, *USER MANUALS, *ACOUSTIC VELOCITY, *ATMOSPHERE MODELS, SCANNING, ANGLES, GROUND LEVEL, INTERFACES, PROFILES, WAVE PROPAGATION, SOUND TRANSMISSION, METEOROLOGY, WIND DIRECTION, LEVEL(QUANTITY), USER NEEDS, GEOMETRY, ATTENUATION, ABSORPTION, REFRACTION, IMPEDANCE, AZIMUTH, SOUND PRESSURE, MOLECULAR PROPERTIES, ATMOSPHERES, ACOUSTIC FIELDS.

Subject Categories : Atmospheric Physics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE