Space Products and Applications (SPA) has been pioneering the application of modern control techniques for orbit control, and has developed an innovative on-board control system for autonomous orbit control and stationkeeping satellites. The basic design is an on-board real-time controller using GPS measurement feedback. This is the first application of closed-loop feedback technique being applied to orbital control, and SPA has been issued a patent on this design (US Patent No. 6,089,507).

Current Projects

Consultancy: Representative for Orbital Sciences Corporation, developing a potential new customer relationship


Design Support

Satellite Operations Consulting Support


Autonomous Onboard Orbit Control System

Closed-Loop Feedback Control w/GPS Input

Formation Flying Attitude and Orbit Control System

Autonomous Unified Orbit and Attitude Control using Closed-Loop Feedback Control w/GPS Input

MODA-PC™ Custom-Built Desktop Solutions


Registered with the U.S. Directorate of Defence Trade Controls (DDTC) for: