Accession Number:

ADA331633

Title:

APEXRAD Documentation

Descriptive Note:

Environmental research papers

Corporate Author:

PHILLIPS LAB HANSCOM AFB MA

Personal Author(s):

• Bell, J. T.
• Gussenhoven, M. S.

Report Date:

1997-09-15

Pagination or Media Count:

39.0

Abstract:

This technical report documents the APEXRAD software package developed by the Phillips Laboratory, Geophysics Directorate. APEXRAD is a utility that predicts satellite dose accumulation behind four different thicknesses of aluminum either slab or hemisphere for specified orbits. Dose accumulation is predicted using empirical dose rate models created using data measured on the APEX Advanced Photovoltaic and Electronics Experiments satellite which flew in a 362 by 2544 km elliptical orbit inclined at 700. These dose models have a higher position resolution at low altitudes than the previously released CRRESRAD models. The APEXRAD models give dose rates averaged over the entire APEX mission and for four different levels of magnetospheric disturbance, based on a 15 day offset by 1 day running average of linear magnetic activity index, Ap. APEXRAD is best applied to orbits with apogees less than 2500 km, perigees greater than 350 km and inclinations less than 600, for times during solar cycle minimum. It can be useful for orbits with higher inclinations or lower perigees, but the user must account for any dose that may be received outside the region covered by the model. For higher altitude orbits the use of CRRESRAD is recommended.

Descriptors:

• *COMPUTER PROGRAM DOCUMENTATION
• *SOLAR RADIATION
• *DOSIMETERS
• SOFTWARE ENGINEERING
• PROTONS
• ELECTRONS
• ARTIFICIAL SATELLITES
• DOSE RATE
• MAGNETOSPHERE
• RADIATION BELTS

Subject Categories:

• Astrophysics
• Computer Programming and Software
• Nuclear Instrumentation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE