Tom Dzamba
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View article: Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study
Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study Open
Star trackers must be calibrated prior to flight so that they can make accurate measurements of star positions within the instrument field of view. This calibration is usually performed in atmosphere and after the sensor is launched; it is…
View article: Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study
Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study Open
Star trackers must be calibrated prior to flight so that they can make accurate measurements of star positions within the instrument field of view. This calibration is usually performed in atmosphere and after the sensor is launched; it is…
View article: Ground Testing Strategies for Verifying the Slew Rate Tolerance of Star Trackers
Ground Testing Strategies for Verifying the Slew Rate Tolerance of Star Trackers Open
The performance of a star tracker is largely based on the availability of its attitude solution. Several methods exist to assess star tracker availability under both static and dynamic imaging conditions. However, these methods typically m…
View article: Ground Testing Strategies for Verifying the Slew Rate Tolerance of Star Trackers
Ground Testing Strategies for Verifying the Slew Rate Tolerance of Star Trackers Open
The performance of a star tracker is largely based on the availability of its attitude solution. Several methods exist to assess star tracker availability under both static and dynamic imaging conditions. However, these methods typically m…
View article: Calibration Techniques For Low-Cost Star Trackers
Calibration Techniques For Low-Cost Star Trackers Open
This study presents a series of cost-effect strategies for calibrating star trackers for microsatellite missions. We examine three such strategies that focus on the calibration of the image detector, geometric calibration of the lab setup …
View article: Improving the Measurement Quality of Small Satellite Star Trackers
Improving the Measurement Quality of Small Satellite Star Trackers Open
Recent demand from the small satellite community has led to the development of a new series of star trackers that are specifically designed for small satellites. These units represent substantial improvements in mass, power consumption and…
View article: Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study
Autonomous optical navigation using nanosatellite-class instruments: a Mars approach case study Open
This paper examines the effectiveness of small star trackers for orbital estimation. Autonomous optical navigation has been used for some time to provide local estimates of orbital parameters during close approach to celestial bodies. Thes…
View article: Characterization of Chromatic Effects in Small Star Trackers
Characterization of Chromatic Effects in Small Star Trackers Open
This paper explores how star color affects the design, calibration, and operation of star trackers. We develop a series of tools that characterize the chromatic performance of a star tracker and suggest how this information can be used in …