Astrorum Consulting LLC
www.astrorum.us

Technical Papers of Interest

  Author(s)     Title
 Hall, Hejduk, and Johnson Time Dependence of Collision Probabilities during Satellite Conjunctions
 Newman, Hejduk, and Johnson  Operational Implementation of a Pc Uncertainty  Construct for Conjunction Assessment and Risk  Analysis
 Hejduk  Covariance Manipulation for Conjunction  Assessment
 Zaidi and Hejduk  Earth Observing System Covariance Realism
 Hejduk and Johnson  Approaches to Evaluating Probability of Collision  Uncertainty
 Vallejo, Hejduk, and Stamey  Trending in Probability of Collision Measurements  via a Bayesian Zero-Inflated Beta Mixed Model
 Frigm, Hejduk, Johnson, and Plakalovic  Total Probability of Collision as a Metric for Finite  Conjunction Assessment and Collision Risk  Management
 Hejduk, Newman, Besser, and Pachura  Predicting Space Weather Effects on Close  Approach Events
 Vallejo, Hejduk, and Stamey  Trending in Probability of Collision Measurements
 Hornwood, Aristoff, Singh, Poore, and Hejduk  Beyond Covariance Realism:  A New Metric for  Uncertainty Realism
 Newman, Frigm, Duncan, and Hejduk Evolution and Implementation of the NASA Robotic Conjunction Assessment and Risk Analysis Concept of Operations
 Hejduk, Plakalovic, Newman, Ollivierre, Hametz,  Beaver, and Thompson  Recommended Risk Assessment Techniques and  Thresholds for Launch COLA Operations
 Hejduk, Casali, Cappellucci, Ericson, and Snow  A Catalogue-Wide Implementation of General  Perturbations Orbit Determination Extrapolated  from Higher-Order Orbital Theory Solutions
 Hejduk, Plakalovic, Newman, Ollivierre, Hametz,  Beaver, and Thompson  Trajectory Error and Covariance Realism for  Launch COLA Operations
 Hejduk, Cowardin, and Stansbery  Satellite Material Type and Phase Function  Determination in Support of Orbital Debris Size  Estimation
 Hejduk  Specular and Diffuse Components in Spherical  Satellite Photometric Modeling
 Hejduk and Ghrist  Solar Radiation Pressure Binning for the  Geosynchronous Orbit
  Narvet, Frigm, and Hejduk  Assessment of Uncertainty-Based Screening  Volumes for NASA Robotic LEO and GEO  Conjunction Risk Assessment
  Plakalovic, Hejduk, Frigm, and Newman  A Tuned Single Parameter for Representing  Conjunction Risk
  Hejduk  Catalogue-wide Satellite Photometric Behavior  Paradigms
  Hejduk and DePalma  Comprehensive Radar Cross-Section Target  Typing Investigation for Spacecraft
  Hejduk  Improved Radar Cross-Section Target Typing for  Spacecraft
 Mulrooney, Matney, Hejduk, and Barker  An Investigation of Global Albedo Values
 Hejduk  Space Catalogue Accuracy Modeling  Simplifications
 Hejduk  Phase Functions of Deep-Space Orbital Debris
 Okada and Hejduk  Satellite Brightness Estimation using Kriging  Optimized Interpolation
 Hejduk, Lambert, Williams, and Lambour  Satellite Detectability Modeling for Optical Sensors
 Hejduk, Lambert, Williams, and Lambour  Improved Satellite Brightness Estimation  Techniques
 Hejduk, Kervin, Lambert, Stansbery, Africano, and  Pearce  Visual Magnitude Satellite Catalogue Release 1.0

The following table gives a download-enabled list of technical papers in which Astrorum personnel have, either in present or previous capacities, participated in some way.  The intent is to give a sense of the kinds of problems we work on and types of solutions we have identified.