A-STR Autonomous Star Tracker
Leonardo SpA (Space Division)
The Leonardo A-STR (Autonomous Star Tracker) is a medium-FOV star tracker in a single assembly housing a radiation-hardened MPP CCD detector. Provides autonomous attitude acquisition without prior spacecraft orientation knowledge (lost-in-space in less than 6 seconds), tracking of up to 10 stars, and in-flight software reprogramming. Attitude bias accuracy is 8.25 arcsec (pitch/yaw) and 11.1 […]
Typed specifications55 values
Discloses 10 of 12 fields engineers filter by in this category (category median 8).
- Accuracy, cross-boresight
- 8.25 arcsec Bias (Gaussian distribution), pitch/yaw, 3sigma, EOL · datasheet p.4 8.25 arcsec pitch/yaw, 3SIGMA; EOL; FULL TEMPERATURE RANGE; 10HZ UPDATED … | 3.6 arcsec max · Low Frequency Error (FOV error), pitch & yaw, 3sigma, EOL, 10Hz | 6 arcsec max · NEA (random error) @0.1°/sec tracking rate, pitch & yaw, 3sigma | 7.5 arcsec max · NEA (random error) @0.5°/sec tracking rate, pitch & yaw, 3sigma +1
- Mass
- 3 550 g with 40° SEA baffle GEO orbit radiation shielding · datasheet p.5 3 550 g with 40° SEA baffle, GEO orbit radiation shielding
- Accuracy, about boresight (roll)
- 11.1 arcsec Bias (Gaussian distribution), roll, 3sigma, EOL · datasheet p.4 11.1 arcsec roll, 3SIGMA; EOL; FULL TEMPERATURE RANGE; 10HZ UPDATED RATE | 21 arcsec max · Low Frequency Error (FOV error), roll, 3sigma, EOL, 10Hz | 63 arcsec max · NEA (random error) @0.1°/sec tracking rate, roll, 3sigma | 78 arcsec max · NEA (random error) @0.5°/sec tracking rate, roll, 3sigma +1
- Envelope (L×W×H)
- 195 x 175 x 290.5 mm (40 deg SEA baffle) product page 195mm x 175mm x 290.5mm 40 deg SEA baffle
- Update rate
- 10 Hz 10Hz, 4Hz · datasheet p.4 4 Hz 10Hz, 4Hz
- Max tracking rate
- 2 °/s max · Tracking rate up to 2°/sec · datasheet p.4
- Sun exclusion angle
- 40 ° 40 deg SEA baffle · datasheet p.4
- Field of view
- 16.4 ° 16.4 x 16.4° · datasheet p.4
- Lost-in-space acquisition time
- 6 s max · from Lost in Space, lower than 6 sec. · datasheet p.4
- Supply voltage
- 20 V min · datasheet p.4 50 V max | 20–50 V
- Power consumption
- 8.9 W 20°C · datasheet p.4 13.5 W 60°C
- Data interface
- MIL-STD-1553 MIL-STD-1553B · datasheet p.4 RS-422 RS 422 | MIL-STD-1553 Telecommand & Telemetry | RS-422 Telecommand & Telemetry
- Operating temperature
- -30 °C min · datasheet p.4 60 °C max | -30–60 °C Operational temperature
- Design lifetime
- 18 years in GEO orbit · datasheet p.4
- Configuration
- single unit integrated in a single assembly · datasheet p.1
- Limiting star magnitude
- 5.5 Mv Dynamic range 1.5Mi to 5.5Mi · datasheet p.4
- Survival temperature
- -35 °C min · datasheet p.4 70 °C max | -35–70 °C Storage temperature
- Random vibration
- 17.5 g RMS Qualification level all axis · datasheet p.4 17.5 g RMS Qualification level, all axis | 22 g RMS min · Design level Higher than 22g rms
- Flight heritage
- More than 100 A-STR FMs sold for GEO, LEO and inter-planetary missions since 2001; more than 90 years of successful operations in space accumulated datasheet p.2 More than 100 A-STR FMs have been sold for GEO, LEO and inter-planetary missions since 2001 and more than 90 years of successful operations in space have been accumulated to the date.
- Satellite class
- GEO datasheet p.2 microsat 10-100 kg | smallsat 100-500 kg | large >500 kg
- Missions flown
- 100 A-STR · datasheet p.2
- Quasi-static load
- 22 g Design level Higher than · datasheet p.4 17.5 g Qualification level
- Shock qualification
- 2 000 g datasheet p.4
- Baffle
- integrated SEA baffle · datasheet p.4
- Detector
- CCD MPP CCD · datasheet p.4
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier17 lines, in the manufacturer's own wording
- Detector
- MPP CCD (radiation-hardened)
- FOV
- 16.4 x 16.4 deg
- Dynamic range
- 1.5-5.5 Mi
- Max stars tracked
- 10
- Tracking rate
- Up to 2 deg/s
- Lis acquisition time
- <6 s
- Update rate
- 10 Hz, 4 Hz
- Accuracy (bias, 3-sigma, EOL)
- 8.25 arcsec pitch/yaw; 11.1 arcsec roll
- Nea @ 0.1 deg/s
- <6 arcsec pitch/yaw; <63 arcsec roll
- Dimensions
- 195 x 175 x 290.5 mm (40 deg SEA baffle)
- Mass
- 3.55 kg (incl. baffle, GEO shielding)
- Supply voltage
- 20-50 V
- Power
- 8.9 W @ 20 deg C; 13.5 W @ 60 deg C
- Interface
- MIL-STD-1553B, RS-422
- Operating temperature
- -30 to +60 deg C
- Design lifetime
- 18 years GEO
- TRL
- 9 (100+ FMs sold since 2001)
About
The Leonardo A-STR (Autonomous Star Tracker) is a medium-FOV star tracker in a single assembly housing a radiation-hardened MPP CCD detector. Provides autonomous attitude acquisition without prior spacecraft orientation knowledge (lost-in-space in less than 6 seconds), tracking of up to 10 stars, and in-flight software reprogramming. Attitude bias accuracy is 8.25 arcsec (pitch/yaw) and 11.1 arcsec (roll) 3-sigma EOL. Update rate is 10 Hz; slew tracking up to 2 deg/s. Power supply 20-50V; power consumption 8.9W at 20 deg C. Mass 3.55 kg including 40-degree sun exclusion angle baffle and GEO shielding. Interfaces via MIL-STD-1553B or RS-422. Designed for 18-year GEO lifetime. Over 100 flight models sold since 2001 for GEO, LEO, and interplanetary missions.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.