In the last two years, a low-cost star tracker has been developed for suborbital applications. Currently the system weighs ~9 lbm, uses ~16W and has a parts cost of ~$12k/unit. The goal of this IRAD is to pursue a size weight and power (SWaP) and parts cost reduction for the star tracker to further its possible mission applications.
Currently the low-cost star tracker for suborbital applications consists of two parts: a tracker head and a processing unit. The size, weight, power and cost for both parts are detailed in the table below:
Tracker Head:
Processing Unit
The objective of the project is to pursue a reduction in size, weight and power for both the tracker as a whole, with a primary focusing on the processing unit. The objectives will be:
Market survey looking at among other things, smart cameras (processor and camera head combined), newer cameras with lower power usage and miniature low power embedded computers and a direction selected
Prototype hardware purchased
Star tracker algorithms ported
Night sky testing of prototype star tracker
TVAC testing of new hardware
Vibration testing of new hardware
The goal is to reduce the SWaP and cost by half for the tracker as a whole getting the total weight to less than 5lbm, total power to less than 8W and total parts cost to less than $6k. The focus will still be on interchangeable COTS components where possible to maintain a simple and easily upgradable system which is robust to parts obsolescence.
More »Low-cost star tracker will enable better attitude estimation and control at a lower cost for suborbital missions. The price allows for missions that could afford this level of pointing to achieve it.
More »Organizations Performing Work | Role | Type | Location |
---|---|---|---|
Goddard Space Flight Center (GSFC) | Lead Organization | NASA Center | Greenbelt, Maryland |