Responsive Environmental Assessment,
Commercial Hosting Demonstration
(REACH)
Theme #3 Contribution: Particle Precipitation
J. Mazur
The Aerospace Corporation
Space Science Applications Laboratory
[email protected]
571-307-3915
24 September 2014
© 2014 The Aerospace Corporation
REACH Project Summary
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Project team: SMC, Aerospace,
Harris Corp., JHU/APL
Commercial hosting of microdosimeters on Iridium-NEXT (780 km
polar orbit, 6 local time planes)
18 dual-dosimeter payloads
delivered with options for additional
units
Different energy thresholds set by
windows of varying thickness
First launch: mid 2015
Last launch: late 2017
Operations through 2030
Dosimeter pod
6 pods in thermal test
4.8x3.4x0.8 in
592 g
0.9 W
Hosting location
Global view of trapped and precipitating particles
New Opportunity
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Dose rates measured at a resolution
of 100 milliseconds and broadcast
from all vehicles at all times
Response functions allow for
inversion of particle energy spectra
– Protons ~12 to 57 MeV
– Electrons ~0.5 to 5 MeV
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Global views of near-real-time
particle precipitation of interest space
weather and operations centers
Primary science applications:
– Electron microbursts
– Solar particle cutoffs
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Will be operating during the extended
mission
Proton response functions
(similar to REACH)
© 2014 The Aerospace Corporation