Francis Laporte (CNES)
Keywords: Conjunction Assessment, Operations, Tools
Abstract:
Conjunction Messages (CM) provided by JSpOC are complete and valuable data to evaluate the level of risk of conjunctions, decide and choose avoidance actions. Nevertheless, conjunction assessment remains a difficult task which requires Middle Man between the CM provider (JSpOC) and Owner/Operators. CAESAR (Conjunction Analysis and Evaluation Service, Alerts and Recommendations) is the French Middle Man. CAESAR relies on a collaborative work environment between CAESAR team and its subscribers. For CAESAR, the collaborative work environment is based on JAC software and a dedicated secure webserver. JAC software is not the Main Flight Dynamics (FD) software used by CAESAR team, but it is a light friendly CM dedicated software to be used on laptops by on-call teams or support dialogue between Middle Man and FD teams. This paper presents the main feedbacks from CAESAR team operational experience and how each new encountered issue has enriched JAC Software functions. JAC has got two levels: – JAC Basic version, to be aware of the situation described with CMs : automatic download of CM from websites with secure password management, capacity to manage CM from different providers, management of the downloaded CM database, visualization of the key data given by the different CM related to each close approach, visualization of the evolution of those key data through tables-graphs-3Danimations, capacity to copy/paste and edit CM data to illustrate sensibility of key parameters, capacity to use several pre-defined dispersions for each primary, printable summary of analysis, statistics on CM in database, – JAC Expert version, to take and validate a decision of avoidance action: sensitivity analysis to errors, thresholds chosen by the user, simulation of maneuvers on the satellite of interest to determine their effect in terms of mitigation of the identified risk. JAC Expert version also includes a monitoring capacity to enable 24/7 analysis. JAC Basic and JAC Expert are distributed by CNES after the signature of a license.
Date of Conference: September 9-12, 2014
Track: Conjunction Assessment