ST400 Star Tracker

The ST400 Star Tracker is a standalone, low mass, low power star tracker, which renders attitude determination capability to small satellites.

The ST400 is an improved version of the smaller ST200 star tracker, which is aimed at applications in pico- and nano-satellite platforms. It features increased attitude determination accuracy and increased radiation tolerance. The ST400 has been qualified for man-rated missions since October 2013 and has flight heritage since Q4 2015.  

Highlights:

 · Attitude determination accuracy (3 σ)：< 10 arcseconds pitch and yaw                      

                                                                       < 120 arcseconds roll

 · 5 Hz update rate

 · RS422/RS485 bidirectional interface

 · All components passed radiation qualification at 11 krad (Si)

 · Plug-and-play ready design

 · Various baffle options available on demand

 · Low mass：280g

 · Low power：< 700 mW

· Outer dimensions：53.8 x 53.8 x 90.5 mm (excluding baffle)

Specifications:

Performance:

 · Attitude determination accuracy (pitch, yaw)：10 arcseconds (3σ)

 · Attitude determination accuracy (roll)：120 arcseconds (3σ)

 · Update rate：5Hz

 · Maximum slew rate (tip/tilt)：> 0.5 °/s

 · Maximum slew rate (roll)：> 1 °/s

Dimensions:

 · Outer dimensions：53.8 x 53.8 x 90.5mm

 · Mass (excluding baffle)：280g

Environmental:

 · Operating temperature：-20 - +40 °C

 · Radiation tolerance：> 11 krad (Si)

 · Equivalent shielding thickness：> 3 mm Al

Electrical:

 · Supply voltage：Min. 3.6V,  Max. 15.0V

 · Power consumption：Min. 370mW,  Typ. 700mW,  Max. 1000m