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Innovative Earth Gravity Reformulation and Numerical Integration for Responsive SSA

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-10-C-0060
Agency Tracking Number: F09B-T02-0128
Amount: $87,486.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: AF09-BT02
Solicitation Number: 2009.B
Solicitation Year: 2009
Award Year: 2010
Award Start Date (Proposal Award Date): 2010-04-01
Award End Date (Contract End Date): 2010-12-31
Small Business Information
7051 Muirkirk Meadows Dv.; Suite A
Greenbelt, MD 20705
United States
DUNS: 108990649
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Steve Casali
 (719) 226-1511
Business Contact
 Mark LeBlanc
Title: VP, Western Region
Phone: (719) 226-1511
Research Institution
 Colorado University
 G. Beylkin
University of Colorado Boulder 526 UCB
Boulder, CO 80309
United States

 (303) 492-6935
 Nonprofit College or University

Currently, computation of the geopotential acceleration and its partial derivatives consumes a large portion of numerical integration time in special perturbations (SP) applications. The standard geopotential formulation is expressed as a spherical harmonic expansion in geocentric latitude, geocentric longitude, and radial distance. Recent research by Dr. Beylkin of the University of Colorado has demonstrated efficient techniques in evaluation of such functions, taking advantage of readily available memory and upfront computations on a spherical grid. These techniques have the potential to greatly speed up SP processing of the high accuracy catalog in the Joint Space Operations Center (JSpOC), thus improving timeliness of operational SP products and relieving analyst work load. Phase 1 will show the applicability of Dr. Beylkin''s research in an operational context, measuring the speed-up attained by his approach relative to the current model for both geopotential-only and full-up numerical integration. The associated memory cost and numerical integration accuracy will be assessed for operational viability and model optimization. Phase I will lead to a prototype that can be incorporated into the SP automatic catalog update application for full, operationally-oriented testing in Phase II. It will also shed light on the effectiveness of techniques applicable to other force model perturbations. BENEFIT: Many Air Force agencies use SP software similar to the current JSpOC SP applications. Therefore, the potential for greatly improved computational efficiency in SP processing has far reaching applicability to a wide range of DoD users.

* Information listed above is at the time of submission. *

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