CaNOP 3U CubeSat Attitude Determination and Control Testing System: Helmholtz Cage Design

Abstract

Canopy Near Infrared Observing Project (CaNOP) is a WSGC-funded 3U CubeSat program to make multispectral reflectance measurements across a range of global forests.  The project requires active attitude knowledge and control. This paper describes the design and construction of a test apparatus to validate the detumbling and attitude control systems of the CaNOP satellite. The apparatus generates a uniform 3-axis adjustable magnetic field to simulate on-orbit magnetic conditions. A Helmholtz cage implements six coils to create a region of uniform and adjustable magnetic field in which to test the orientation and attitude determination and control systems of a satellite.