DART: Simulating Planned Liciacube Imagery of Dart Impact Ejecta Based on Ejecta Dynamics Simulation Output
No abstract provided
Chesley, Steve↗
Engineering topics
Fahnestock, Eugene G.
Publications and source records attributed to Fahnestock, Eugene G..
Fate and Dynamics of Ejecta Liberated by the Proposed DART Impact
No abstract available
Fahnestock, Eugene G.↗
Spacecraft Thermal and Optical Modeling Impacts on Estimation of the GRAIL Lunar Gravity Field
We summarize work performed involving thermo-optical modeling of the two Gravity Recovery And Interior Laboratory (GRAIL) spacecraft. We derived several reconciled spacecraft thermo-optical models having varying detail. We used the simplest in calculating SRP acceleration, and used the most detailed to calculate acceleration due to thermal re-radiation. For the latter, we used both the output of pre-launch finite-element-based thermal simulations and downlinked temperature sensor telemetry. The estimation process to recover the lunar gravity field utilizes both a nominal thermal re-radiation accleration history and an apriori error model derived from that plus an off-nominal history, which bounds parameter uncertainties as informed by sensitivity studies.
thermal modeling↗