HST-A1 Star Tracker
TY-Space Technology
The HST-A1 is a fully autonomous, high-precision star tracker offering ultra-high pointing accuracy (up to 0.3 arcseconds, 3-sigma) for satellite attitude determination.
Technical specifications
- Lens dimensions
- 140x125x212 mm3
- Sensor+Baffle dimensions
- 155x155x297 mm3
- Mass
- 4700 g
- Optical Design
- Refractive
- Vibration (FM)
- sine 13g, random 12 grms
- Vibration (Qualification)
- sine 16g, random 18 grms
- Working Temperature
- -10 to 30 C
- Radiation Resistance
- 50 Krad [Si]
- Field of View
- 5.5x5.5 deg [effective]
- Attitude Accuracy (pointing/rolling)
- <0.3" [3sigma] / <5" [3sigma]
- Update Rate
- 10 Hz
- Slew Rate
- 1.5 deg/s
- Sensitivity
- 10 Mv
- Sun Exclusive Angle
- < 30 deg
- Earth Exclusive Angle
- < 30 deg
- Data Interface
- RS422/CAN
- Power Consumption
- 3.5 W
- Input Voltage
- 28 V
- Life Time
- 7 years
About
The HST-A1 Star Tracker is a fully autonomous, high-precision attitude sensor designed for satellite platforms requiring exceptional pointing accuracy. It uses a refractive optical design with a 5.5×5.5 degree effective field of view and can detect stars down to 10Mv sensitivity, enabling reliable star pattern recognition and attitude solutions in orbit. It delivers attitude accuracy of <0.3 arcsec (3-sigma) in pointing and <5 arcsec (3-sigma) in roll, updating at 10 Hz with slew-rate tolerance of 1.5 deg/s. It is rated for 50 Krad [Si] radiation resistance, operates from -10C to 30C, and withstands qualified/flight vibration loads (13g sine/12 grms random FM; 16g sine/18 grms random qualification). It communicates via RS422/CAN, runs on 28V while consuming 3.5W, and has a 7-year rated lifetime – suited for long-duration Earth observation and other precision-pointing missions.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
