THE AEROSPACE CORPORATION
This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This project will determine how short-term dynamics influences the long-term behavior of Earth's inner radiation belt (Van Allen belt). An existing physics based inner radiation belt model developed under a previous NSF Space Weather award will be the starting point of the analysis. Fifteen (15) years of in-situ observations of solar proton trapping and geomagnetic storm-associated losses will be incorporated into the into model of the inner belt using data assimilation techniques. This will comprehensively determine the trapping and loss signatures of the particles as functions of energy, pitch angle, radial distance from the Earth, and geomagnetic and solar wind parameters. Multivariate statistical techniques will be applied to this solar-cycle reanalysis to understand how short-term, inner belt space weather leads to long-term, inner belt climate. This combination of simulations, observations, and data-assimilation statistical techniques has never been applied to the inner belt to answer climatological questions. The project will capitalize on recent scientific progress made in the modeling of the inner belt and will address the primary radiation environment hazard for the satellite design community. The solar-cycle reanalysis of the inner belt will feed directly into the on-going development of more accurate radiation specification models, addressing the top priority radiation environment need of the spacecraft engineering community. This unique connection between research and operations also develops partnerships between communities and across disciplines, and ensures broad dissemination of the results.
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| AWARD OVERVIEW |
| Award Number |
0902956 |
Funding Agency |
National Science Foundation |
| Total Award Amount |
$315,000 |
Project Location - City |
El Segundo |
| Award Date |
07/20/2009 |
Project Location - State |
CA |
| Project Status |
More than 50% Completed |
Project Location - Zip |
90245-4609
|
| Jobs Reported |
1.27 |
Congressional District |
33 |
| Project Location - Country |
US |
|
|
Recipient Information
(Grants)
| Recipient Information (Grants) |
|
Recipient Name
|
THE AEROSPACE CORPORATION |
| Recipient DUNS Number |
009553637
|
| Recipient Address |
2350 E EL SEGUNDO BLVD |
| Recipient City |
EL SEGUNDO |
| Recipient State |
California |
| Recipient Zip |
90245-4609 |
| Recipient Congressional District |
33 |
| Recipient Country |
USA |
Required to Report Top 5
Highly Compensated Officials |
No |
Projects and Jobs Information
| Projects and Jobs Information |
| Project Title |
GEM: Inner Radiation Belt Data Assimilation |
| Project Status |
More than 50% Completed |
| Final Project Report Submitted |
No |
| Project Activities Description |
Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) |
| Quarterly Activities/Project Description |
The NSF project titled GEM: Inner Radiation Belt Data Assimilation and Climatology is approaching the end of our period of performance in Jun 13. We computed daily observational constraints for data assimilation from two datasets, HEO/DOS and SAMPEX/PET. These observational constraints (obscon) are a combination of daily inner radiation belt data with projection of the SIZM model domain which contributes to these data. We computed PET observational constraints from 1998 through the end of the SAMPEX main mission in Jun 04. We processed post-mission SAMPEX data into a format easily translated into the data assimilation obscon format from July 2004 until the PET instrument failed in Sep 09. We have computed obscons from HEO/DOS from 1998–2013 and anticipate running a data-assimilation interval from 1998 - present, almost 1.5 solar cycles. We demonstrated a data-assimilation run with PET and DOS datasets. PET, in LEO, constrains the model ensembles at all L values but low altitude, while DOS constrains the model ensembles at high altitude but for particular K values. By combining both of these complementary constraining datasets, we have demonstrated (for Nov 01) that the best-fit inner belt state is smooth in flux at both the inside and outside of the inner belt. This overcomes a shortcoming of the simulation presented at the Fall AGU meeting in Dec 12. We associated inter-calibrated residual errors with optimized HEO data in the assimilation, appropriately weighting these data in the simulation. In the future we will determine the residual errors of PET data after inter-calibrating with GOES measurements during solar particle events. Our work will be presented at the NSF-sponsored Geospace Environment Modeling (GEM) workshop in Snowmass CO in June 2013. We are drafting a manuscript for publication in the Journal of Geophysical Research – Space Physics. It will describe the observations used, the data assimilation method, and present results of data assimilation. |
| Jobs Created |
1.27 |
| Description of Jobs Created |
Principle Investigators and office support staff retained |
Purchaser Information
(Grants)
| Purchaser Information |
| Contracting Office ID |
Not Reported |
| Contracting Office Name |
Not Available |
| Contracting Office Region |
Not Available |
| TAS Major Program |
49-0101 |
| Award Information |
| Award Date |
07/20/2009 |
| Award Number |
0902956 |
| Order Number |
|
| Award Type |
Grants |
| Funding Agency ID |
49 |
| Funding Agency Name |
National Science Foundation |
| Funding Office Name |
Not Available |
| Awarding Agency ID |
49 |
| Awarding Agency Name |
National Science Foundation |
| Amount of Award |
$315,000 |
| Funds Invoiced/Received |
$264,216 |
| Expenditure Amount |
$277,451 |
| Infrastructure Expenditure Amount |
$0 |
| Infrastructure Purpose and Rationale |
Not Reported |
| Infrastructure Point of Contact Name |
Not Reported |
| Infrastructure Point of Contact Email |
Not Reported |
| Infrastructure Point of Contact Phone |
Not Reported |
| Infrastructure Point of Contact Address |
Not Reported |
| Infrastructure Point of Contact City |
Not Reported |
| Infrastructure Point of Contact State |
Not Reported |
| Infrastructure Point of Contact Zip |
Not Reported |
Product or Service Information
(Grants)
| Product or Service Information |
| Primary Activity Code |
541712 |
| Activity Description |
Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) |
| Sub-Awards Information |
| Sub-awards to Organizations |
0 |
| Sub-award Amounts to Organizations |
$0 |
| Sub-Awards to Individuals |
0 |
| Sub-Award Amounts to Individuals |
$0 |
| Number of Sub-awards less than $25,000/award |
0 |
| Amount of Sub-awards less than $25,000/award |
$0 |
| Number of payments to vendors greater than $25,000 |
0 |
| Total Amount of payments to vendors greater than $25,000/award |
$0 |
| Number of payments to vendors less than $25,000/award |
0 |
| Total Amount of payments to vendors less than $25,000/award |
$0 |
| Location Information |
| Latitude, Longitude |
33º 54' 58",
-118º 22' 57" |
| Congressional District |
33 |
| Address 1 |
2310 E. El Segundo Blvd |
| Address 2 |
|
| City |
El Segundo |
| County |
Los Angeles |
| State |
CA |
| Zip |
90245-4609 |
|
 |