# Presentation: 889772

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

**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**

## Guidelines

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

##  electrons: 40 keV - 5 MeV, 12 ch

-  protons: 100 keV – 170 MeV, 20 ch
- 1-11 Re, r=0.1 Re
-  +/- 700 MLAT

## “...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 Earth’s Trapped Radiation Environment*,
- J.I. Vette, K.W. Chan, M.J. Teague
- AFGL-TR-78-0130, 1978

## AFRL Data Sets

| Sat | Launch Date | Terminate Date | Perigee (km) | Apogee (km) | Incl. | Period | Spin rate | Instrument |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| DMSP-F7 | 1 NOV 83 | 31 DEC 87 | 840 | 840 | 98.8 | 101 min | none | SSJ* dosimeter |
| CRRES | 25 JUL 90 | 12 OCT 91 | 350 | 36000 | 18 | 10 hr | 2 rpm | PROTEL, HEEF, dosimeter |
| APEX | 5 AUG 94 | MAY 96 | 362 | 2544 | 70 | 115 min |  | PASP+ dosimeter |
| TSX-5 | 7 JUN 00 | active | 410 | 1710 | 69 | 100 min | none | CEASE-I telescope, dosimeter |
| DSP21 | 6 AUG 01 | active | GEO |  |  | 24 hr |  | CEASE-II telescope, dosimeter, ESA |

**AFRL Data Sets**

## Temporal Coverage

## Spatial Coverage

**DMSP-rad**

**APEX-rad**

**TSX5-rad**

**CRRES-rad**

## ProTel - High Energy Head

**ProTel - High Energy Head**

| Energy Boundaries (MeV) |  |  |
| --- | --- | --- |
| Lower  | Upper | Mid |
| 1.1 | 1.9 | 1.5 |
| 1.9 | 2.3 | 2.1 |
| 2.3 | 2.7 | 2.5 |
| 2.7 | 3.1 | 2.9 |
| 3.1 | 5.5 | 4.3 |
| 5.5 | 5.9 | 5.7 |
| 5.9 | 7.7 | 6.8 |
| 7.7 | 9.3 | 8.5 |
| 9.3 | 10.1 | 9.7 |
| 10.1 | 11.3 | 10.7 |
| 11.3 | 15.1 | 13.2 |
| 15.1 | 23.7 | 19.4 |
| 23.7 | 28.9 | 26.3 |
| 28.9 | 32.9 | 30.9 |
| 32.9 | 40.2 | 36.3 |
| 40.2 | 43.2 | 41.1 |
| 43.2 | 50.8 | 47 |
| 50.8 | 59.2 | 55 |
| 59.2 | 72.2 | 65.7 |
| 72.2 | 90.4 | 81.3 |

**Low Energy Head (1-9 MeV)**

**High Energy Head (6-100 MeV)**

## CRRES/PROTEL Survey

**25 July 1990 - 12 October 1991**

**CRRES/PROTEL Survey**

##  CRRESPRO

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

-  CRRESPRO

## CRRESPRO - AP8max Comparison

## CRRESPRO - AP8max Comparison

## AFRL Dosimeters

**AFRL Dosimeters**

**DMSP-F7 / SSJ***

## AFRL Dosimeters

| Dome | Al Shield
(mils) | LoLET |  | HiLET |  |
| --- | --- | --- | --- | --- | --- |
|  |  | Electrons (MeV) | Protons
(MeV) | Electrons (MeV) | Protons (MeV) |
| D1 | 80 | >1.0 | >80 | - | >20 |
| D2 | 225 | >2.5 | >115 | - | >35 |
| D3 | 442 | >5.0 | >120 | - | >51 |
| D4 | 857 | >10 | >125 | - | >75 |

**AFRL Dosimeters**

## DMSP-F7 / SSJ*

**DMSP-F7 / SSJ***

- >20 MeV p

## AFRL Dosimeters

| Dome | Al Shield
(mils) | LoLET |  | HiLET |  |
| --- | --- | --- | --- | --- | --- |
|  |  | Electrons (MeV) | Protons
(MeV) | Electrons (MeV) | Protons (MeV) |
| D1 | 80 | >1.0 | >80 | - | >20 |
| D2 | 225 | >2.5 | >115 | - | >35 |
| D3 | 442 | >5.0 | >120 | - | >51 |
| D4 | 857 | >10 | >125 | - | >75 |

**AFRL Dosimeters**

## CRRES/dosimeter

**CRRES/dosimeter**

- >20 MeV protons

## AFRL Dosimeters

| Dome | Al Shield
(mils) | LoLET |  | HiLET |  |
| --- | --- | --- | --- | --- | --- |
|  |  | Electrons (MeV) | Protons
(MeV) | Electrons (MeV) | Protons (MeV) |
| D1 | 4.29 | >0.15 | >80 | - | 5-80 |
| D2 | 82.5 | >1.0 | >115 | - | 20-115 |
| D3 | 232.5 | >2.5 | >120 | - | 32-120 |
| D4 | 457.5 | >5.0 | >125 | - | 52-125 |

**AFRL Dosimeters**

## APEX/PASP+

**APEX/PASP+**

- >20 MeV protons

## AFRL Dosimeters

| Dome | Al Shield
(mils) | LoLET
(0.05-1 MeV deposit) |  | HiLET-A
(1-3 MeV deposit) |  | HiLET-B
(3-10 MeV deposit) |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
|  |  | Electrons (MeV) | Protons
(MeV) | Electrons (MeV) | Protons (MeV) | Electron (MeV) | Protons (MeV) |
| D1 | 80 | >1.0 | >20 | >1.5 | >25 | >7 | >20 |
| D2 | 225 | >2.5 | >38 | >3.5 | >40 | - | >38 |

**AFRL Dosimeters**

## TSX5/CEASE

**TSX5/CEASE**