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,… More

In the space domain, operators are faced with unmanageably large amounts of ambiguous data. The challenge, given manpower and time constraints, is using this data for situational awareness, space Command and Control (C2) and Courses of Action (COAs) development for Defensive and Offensive Counter… More

ABSTRACT: The leading errors in computing future positions of satellites in Low Earth Orbit (LEO) are generally due to inaccuracies in the thermospheric density and the prediction thereof. The use of Dynamic Calibration Atmosphere (DCA) has significantly reduced these traditional sources of error… More

ABSTRACT: Computation of the geopotential acceleration and its partial derivatives per the standard formulation consumes considerable numerical integration time in special perturbations (SP) applications. Recent research by Dr. Beylkin of the University of Colorado (CU) has demonstrated efficient… More