Collisions, explosions and breakups of space objects create a cloud of new earth-orbiting objects, called space debris. Modeling of these processes of debris generation is one of the primary steps in many types of orbital debris analyses. These analyses include assessments to identify satellites at risk from a recently generated debris cloud, whether it is from a real event, a proposed test, or a
... [Show full abstract] hypothesized event, and future debris environment projections to identify effective mitigation techniques and possible future operational environments for satellite operations and survivability analysis. Additionally, debris generation models can be used as tools in forensic analyses of on-orbit events to assist in determining possible causes. The Aerospace Corporation has used the IMPACT fragmentation model to perform debris generation modeling for more than 25 years. IMPACT is a semi-empirical model combining empirical distribution information with basic conservation laws to generate explosion and hypervelocity collision fragment characteristics including fragment numbers, mass, spreading velocity and area-to-mass ratio distributions. Recent developments in data analysis techniques have enabled a new level of insight into a number of historical fragmentation events. These data have been used to improve both the collision and explosion modeling algorithms in IMPACT, resulting in an enhanced ability to model a diverse set of fragment generating events.