A new model for the low altitude trapped proton environment

Author

Huston, S.L. ; Pfitzer, K.A.

Author_Institution

Boeing Co., Huntington Beach, CA, USA

Volume

45

Issue

6

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

2972

Lastpage

2978

Abstract

We have developed a new model for the low-altitude (250-850 km) trapped radiation environment based on data from the TIROS/NOAA polar orbiting spacecraft. The model is based on a long time series (more than one complete solar cycle) obtained from the TIROS/NOAA data. The model provides the integral flux of protons in three energy channels (>16, >36, and >80 MeV) as a function of position in geomagnetic coordinates and solar radio flux. The model includes a phase lag between the solar activity and the proton flux; the phase lag is a function of energy and position in geomagnetic coordinates. Comparison with the AP8 models shows that the new model predicts fluxes approximately twice as large as AP8. These data have important implications for the development and use of trapped radiation models

Keywords

artificial satellites; proton effects; space vehicle electronics; time series; 250 to 850 km; TIROS/NOAA polar orbiting spacecraft; energy channels; geomagnetic coordinates; integral flux; low altitude trapped proton environment; phase lag; solar activity; solar radio flux; time series; Artificial satellites; Belts; Earth; Geomagnetism; Instruments; Magnetic fields; Orbital calculations; Predictive models; Protons; Space vehicles;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.736554

Filename

736554