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Off the Shelf

Sun Sensors

Overview

Bradford's range of sun sensors have been trusted for decades as highly performing and reliable options for missions from LEO to the harshest orbits, granting satellites sun vector information for both operational solar array pointing and safe mode power-positive recovery responses.

The detecting element at the heart of each Bradford sun sensor is a p-n junction silicon photodiode, covered with a thick coverglass giving innate radiation hardness. Drift effects are well characterised and corrected to give a consistent and predictable result over the lifetime of the sensors.

Most Bradford sun sensors are passive devices and have limited failure modes. They interface via well-defined analogue signal interfaces direct to your OBC. Each model had provisions for alignment correction.

As with all Bradford products, these are manufactured in an AS9100-compliant facility and come with full quality traceability of constituent materials and components, all of which are selected to meet ESA S-class standards. They have proven their reliability across thousands of cumulative years on orbit. Bradford's expertise in sun sensors extends nearly half a century, with our products tracing their origins to 1975, since when they have been in continuous manufacture.

Selected
Model Comparison
ModelTypical Field of ViewTypical MassTypical 3σ Accuracy Internal RedundancyPower DrawSun Information Output
Coarse
180 °
215 g
± 1.5 °
Passive
Vector
Cosine
160 °
25 g
± 3.0 °
X
Passive
Cone
Redundant Cosine
180 °
15 g
± 3.0 °
Passive
Cone
Fine
128 °
375 g
± 0.3 °
X
< 0.3 W
Vector
Mini Fine
128 °
50 g
± 0.2 °
X
Passive
Vector

Note: accuracy performance is bounded by OBC input sensitivity!

Key Advantages
  • Wide FoV or excellent accuracy options
  • Based on a proven technology with innate radiation hardness
  • Suitable for LEO, MEO, GEO, HEO or beyond Earth missions, including missions close to the Sun.
  • Quantified reliability figures available
  • EMI silent and insusceptible
  • Models with internal redundancy available
  • Extensive flight heritage and decades of accumulated experience - Bradford is Europe's #1 supplier of sun sensors

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