Coarse Analog Sun Sensor

The Coarse Analog Sun Sensor (CASS) contains a 2-segment solar cell. Each cell segment generates a short circuit current (ISC) proportional to illumination intensity. These two currents are processed at the spacecraft level to indicate sun angle ∝ and Sun Presence. The CASS solution is Rad hard to more than 100 krad (Si).

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KEY SPECIFICATIONS

Applications
  • Solar-Array Pointing
  • Sun Acquisition
  • Fail-Safe Recovery
  • Sun Presence
Parameters
Number of Measurement Axes

1

Linear Range

±20°

Full Field of View (FOV)

±40° (Can be modified to meet specific FOV requirements)

 

Insensitive Direction

±55° Min.

Configuration
Option 1: Typical CASS
  • Input Power: None
  • Output: 0 to 300 μA  (Each Solar Cell)
  • Mass: Approx. 45 g. (0.1 lb.)
  • Dimensions: 51 mm. x 25 mm x 18 mm.                                   (2″ x 1″ x 0.7″) Exclusive of Connector
Option 2: CASS with built in amplifier
  • Input Power: +12 VDC to +15 VDC = 100 MW
  • Output: 0 to 5 VDC (Each Channel)
  • Mass: 68 g. (0.15 lb.)
  • Dimensions: Approx. 51 mm. x 25 mm. x 25 mm.                (2″ x 1″x 1″) Exclusive of Connector