s Center for Space Standards and Innovation

Colorado Springs, CO, United States

s Center for Space Standards and Innovation

Colorado Springs, CO, United States
SEARCH FILTERS
Time filter
Source Type

Oltrogge D.L.,s Center for Space Standards and Innovation | Kelso T.S.,s Center for Space Standards and Innovation | Seago J.H.,Analytical Graphics Inc.
Advances in the Astronautical Sciences | Year: 2011

Increasing international cooperation in the areas of orbital collision avoidance and electro-magnetic interference mitigation has driven the exchange of satellite ephemerides to support Space Situational Awareness, threat detection, and avoidance. To be useful, ephemerides must conform to certain specifications in order to ensure that the intended precision of these analyses is achieved. This paper examines the accuracy of various interpolation methods as a function of ephemeris step size and ephemeris numerical precision for a variety of orbital regimes.


Oltrogge D.L.,s Center for Space Standards and Innovation | Oltrogge D.L.,1Earth Research LLC
Advances in the Astronautical Sciences | Year: 2012

Maneuver detection and calibration for arbitrary satellites observed using Non-Cooperative Tracking techniques is a challenging problem. In this paper, we derive new burn reconstruction models capable of performing long-duration maneuvers better suited to Earth-pointing satellites whose body frame axes are either velocity-, radial, or inertially-aligned. We then attempt to reconstruct unknown maneuvers using only the pre- and post-burn ephemerides and the new velocity-aligned reconstruction technique. Maneuver start and stop time are determined by minimizing the weighted position and velocity residuals at the end of the burn. We then compare the optimized burn conditions with simulated actual burn conditions.


Oltrogge D.L.,s Center for Space Standards and Innovation | Alfano S.,s Center for Space Standards and Innovation
Advances in the Astronautical Sciences | Year: 2012

Track misassociation, cross-tag and orbit maneuver events can often be detected using a low-pass filter based upon pre- and post-event statistics accumulation. In this paper, we examine the implementation of such a filter in the Orbit Detective tool, and we apply the filter to the Galaxy 15 mission to determine cross-tag frequency of occurrence. Maneuver detection and calibration using such a low-pass filter are also discussed.


Oltrogge D.L.,s Center for Space Standards and Innovation | Kelso T.S.,s Center for Space Standards and Innovation
Advances in the Astronautical Sciences | Year: 2012

Our space population continues to increase as satellites are launched and debris- producing catastrophic events occur. For operators and policy makers, a periodic examination of the publicly available space population is useful. In this paper, bivariate distributions and visualizations of orbital elements and simple spatial density metrics clearly delineate regions of higher collision risk. For the highest risk region, benefits obtained by application of ISO orbital debris mitigation standards are discussed. Application of concentric spherical zone "Ring Shells" governed in latitude by object maximum latitude distribution helps provide a more realistic spatial density and collision probability picture compared with previous analyses.

Loading s Center for Space Standards and Innovation collaborators
Loading s Center for Space Standards and Innovation collaborators