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Related Experiment Videos

Digital sun sensor multi-spot operation.

Giancarlo Rufino1, Michele Grassi

  • 1Department of Aerospace Engineering, University of Naples "Federico II", Piazzale Tecchio 80, 80125 Naples, Italy. giancarlo.rufino@unina.it

Sensors (Basel, Switzerland)
|February 28, 2013
PubMed
Summary

This study validates a multi-spot digital sun sensor for precise sun-line determination. The sensor maintains high precision even with wide fields of view and variable sun spot intensity.

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Area of Science:

  • Spacecraft attitude determination
  • Optical sensing technologies
  • Precision measurement systems

Background:

  • Precise sun-line determination is critical for spacecraft navigation.
  • Traditional sun sensors face challenges with wide fields of view and variable illumination.
  • Multi-spot imaging offers potential for improved accuracy through data averaging.

Purpose of the Study:

  • To experimentally validate the wide field of view operation of a multi-spot digital sun sensor.
  • To assess the sensor's precision under variable conditions (number of sun spots, intensity).
  • To confirm the effectiveness of a variable shutter time acquisition procedure and calibration function.

Main Methods:

  • Utilized a multi-spot digital sun sensor prototype.
  • Employed a laboratory test facility to simulate various operational scenarios.
  • Implemented a variable shutter time for image acquisition.
  • Developed a calibration function incorporating sun-spot array size knowledge.

Main Results:

  • Demonstrated the sensor's capability for precise sun-line determination.
  • Confirmed high measurement precision is achievable across a wide field of view.
  • Showcased robustness in handling variable numbers and intensities of sun spots.
  • Validated the effectiveness of the proposed image acquisition and calibration methods.

Conclusions:

  • The multi-spot digital sun sensor is effective for precise sun-line determination.
  • The sensor maintains high precision even at large off-boresight angles.
  • The developed methods ensure reliable operation under challenging, variable conditions.

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