D'H' BRAUTIGAM

1
AFRL Proton Radiation Belt Models and Data Sets
Working Group Meeting on New Standard Radiation
Belt and Space Plasma Models for Spacecraft
Engineering Greenbelt, MD 5-8 October 2004

• D.H. BRAUTIGAM
• SPACE VEHICLES DIRECTORATE
• AIR FORCE RESEARCH LABORATORY

2
Guidelines

• Coverage
• Energy
• Spatial
• Temporal
• Calibration
• Accelerator, Monte Carlo
• In-flight, cross-instrument
• Comparison with AP-8, AE-8

3

• electrons 40 keV - 5 MeV, 12 ch
• protons 100 keV 170 MeV, 20 ch
• 1-11 Re, ?r0.1 Re
• /- 700 MLAT

4
a straight forward geometrical approach might
require a storage size of some 107 to 108 bytes.
This would clearly be cumbersome, if not totally
impractical, even with present day computer
technology. Problems in Modeling the Earths
Trapped Radiation Environment, J.I. Vette, K.W.
Chan, M.J. Teague AFGL-TR-78-0130, 1978
5
AFRL Data Sets
6
Temporal Coverage
7
Spatial Coverage
DMSP-rad
APEX-rad
TSX5-rad
CRRES-rad
8
ProTel - High Energy Head
Low Energy Head (1-9 MeV)
High Energy Head (6-100 MeV)
9
CRRES/PROTEL Survey
25 July 1990 - 12 October 1991
10
CRRESPRO

• binned in L
• binned in B/Bo
• mapped to equator
• equatorial distributions mapped along field
  lines
• activity
• quiet pre March 1991
• active post March 1991

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CRRESPRO - AP8max Comparison
12
CRRESPRO - AP8max Comparison
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AFRL Dosimeters
DMSP-F7 / SSJ
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AFRL Dosimeters
DMSP-F7/SSJ
15
DMSP-F7 / SSJ
gt20 MeV p
16
AFRL Dosimeters
CRRES/dosimeter
17
CRRES/dosimeter
gt20 MeV protons
18
AFRL Dosimeters
APEX/PASP
19
APEX/PASP
gt20 MeV protons
20
AFRL Dosimeters
CEASE/dosimeter
21
TSX5/CEASE