Redwire SpectraTRAC Star Tracker
Redwire Corporation
Compact, autonomous Lost-in-Space star tracker for CubeSat, NanoSat, and Spaceflight missions.
Technical specifications
- Accuracy (cross-axis / boresight)
- <6 arcsec / 27 arcsec
- Update rate
- 4 Hz
- Max tracking rate
- >2.0 deg/sec
- Time to solution
- 230 ms LIS, 170 ms track (typical)
- Star catalog
- 1889 stars (6th visual magnitude)
- Lens
- 22 mm aperture, F1.2 BK7 glass
- AFOV
- 19 deg x 14 deg
- Sky coverage
- >99%
- Mass (with baffle)
- 475 g
- Dimensions (L x W x H, with baffle)
- 120 x 61 x 61 mm
- Power
- 5.0 VDC, 2.5 W average
- Interface
- RS-422 serial
- Sun exclusion angle (with baffle)
- 45 deg
- Operating temperature
- -30C to +55C
- Design life
- 5 years (25% duty cycle, LEO)
About
SpectraTRAC is Redwire’s self-contained star tracker for Spaceflight, CubeSat, and NanoSat missions, offering Lost-in-Space star identification without external initialization. On power-up the unit begins delivering attitude quaternions at a 4 Hz update rate with a maximum slew tracking capability greater than 2 deg/sec.
The tracker uses a 22 mm aperture F1.2 BK7 glass lens and an onboard catalog of 1889 stars (6th visual magnitude), with a 45-degree sun exclusion angle when the baffle is fitted. Cross-axis accuracy is typically better than 6 arcsec (10 arcsec test-capability spec), with boresight accuracy of 27 arcsec. Typical time to first solution is 230 ms (Lost-in-Space) and 170 ms for subsequent tracking.
Including its baffle, the unit weighs 475 grams and measures 120 x 61 x 61 mm, drawing an average of 2.5 W from a 5.0 VDC supply over an RS-422 serial interface. Sky coverage exceeds 99% with an angular field of view of 19 x 14 degrees, and the design life is rated at 5 years in LEO at a 25% duty cycle.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
