Low Cost, High Precision Navigation and Attitude Determination System for Microsatellites

In Phase II, Microcosm, with our principal subcontractor, NAVSYS, propose to develop a breadboard prototype of the Precision Navigation with Integrated Attitude Determination (PNIAD) system - a very compact package that integrates an IMU, a GPS receiver, and a small star sensor. Phase I focused on the top level design and establishing system performance via simulation. Preliminary requirements were developed, based partially on discussions with potential PNIAD customers. In Phase II, requirements will be refined to produce prototype specifications. Additional design and simulation work will be carried out, leading to the fabrication of a breadboard PNIAD unit, including an initial version of the operational software. Prototype laboratory testing will complete the Phase II technical work, which will lay the groundwork for development of a brassboard version of PNIAD in a Phase II enhancement or Phase III program. Test results will be compared with simulated results to identify areas for improvement. Small spacecraft can be more agile, but also tumble easier and require much more responsive control than traditional large satellites. PNIAD can accommodate these aggressive performance needs. Microcosm is in discussions with a major aerospace prime contractor to secure additional funding for follow-on development work.