NSF Org:	AGS Division of Atmospheric and Geospace Sciences
Recipient:	NATIONAL NUCLEAR SECURITY ADMINISTRATION
Initial Amendment Date:	April 10, 2002
Latest Amendment Date:	April 6, 2005
Award Number:	0202257
Award Instrument:	Interagency Agreement
Program Manager:	Kile B. Baker AGS  Division of Atmospheric and Geospace Sciences GEO  Directorate for Geosciences
Start Date:	April 1, 2002
End Date:	March 31, 2006 (Estimated)
Total Intended Award Amount:	$90,000.00
Total Awarded Amount to Date:	$270,000.00
Funds Obligated to Date:	FY 2002 = $90,000.00 FY 2003 = $90,001.00 FY 2004 = $89,999.00
History of Investigator:	Geoffrey Reeves (Principal Investigator) reeves@lanl.gov Reiner Friedel (Co-Principal Investigator)
Recipient Sponsored Research Office:	Department of Energy Albuquerque Operations Office PENNSYLVANIA & H ST SE ALBUQUERQUE NM  US  87185
Sponsor Congressional District:	01
Primary Place of Performance:	Los Alamos National Laboratory SM 30 BIKINI ATOLL RD MSP LOS ALAMOS NM  US  87545-0001
Primary Place of Performance Congressional District:	03
Unique Entity Identifier (UEI):	J8M7ZJ3J4ZA9
Parent UEI:	NW2RJN8TQQW1
NSF Program(s):	MAGNETOSPHERIC PHYSICS
Primary Program Source:	app-0102  app-0103  app-0104
Program Reference Code(s):	1323, 9150, EGCH
Program Element Code(s):	575000
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

This research program will test current theories and models of the radiation belts by comparing the theoretical and model results with observational data obtained from the NASA Polar satellite and the GPS satellites. It will develop statistical descriptions of the particle pitch angle distributions for different L-shells and different local times as a function of the phase of a magnetic storm. This will make it possible to distinguish among competing theories for the transport and loss of relativistic electrons. It will also determine which mechanisms dominate the transport and loss processes under different conditions. In addition, the project will develop time-dependent phase space density profiles for the events selected for study in the Geospace Environment Modeling campaign on the inner magnetosphere and magnetic storms. These profiles will be made available to the space physics community to help establish an understanding of when and where relativistic electron acceleration is occurring. The profiles will also be useful in constraining the theoretical work currently being done.

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