Accession Number : ADA257627


Title :   Sun Sensor Implementation Using Solar Power Arrays


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Sityar, Irma


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257627.pdf


Report Date : Sep 1992


Pagination or Media Count : 82


Abstract : This thesis explores the feasibility of utilizing a satellite's solar cell power arrays as a sun sensor. Power output of a solar cell is highly dependent on the intensity and direction of sunlight that falls on the panel and thus provides an indication of the sun's orientation. A sun sensor can be obtained by processing the power signal generated in each solar cell panel. This concept was applied to the Naval Postgraduate School's Petite Amateur Navy Satellite (PANSAT), a 26 sided polyhedral shaped satellite with 17 body mounted square panels. Two circuit configurations to meter the power signals generated in the 17 individual solar panels were investigated. It was possible in one configuration to develop a prediction model of each panel's short circuit current versus sun angle. Compensation for seasonal variations in solar flux, solar cell degradation due to radiation and panel temperature variation is required. An estimation of the resulting sun sensor's resolution and accuracy is given.


Descriptors :   *DETECTORS , *ARRAYS , *POWER , *SOLAR PANELS , *SUN , OUTPUT , ANGLES , RADIATION , PREDICTIONS , CELLS , NAVY , PANELS , INTENSITY , CONFIGURATIONS , SILICON , SIGNALS , SOLAR CELLS , SEASONAL VARIATIONS , VARIATIONS , SEMICONDUCTORS , THESES , ACCURACY , SUNLIGHT , GERMANIUM , COMPENSATION , SHORT CIRCUITS , CIRCUITS , ELECTRIC POWER , ARTIFICIAL SATELLITES , RESOLUTION , GALLIUM ARSENIDES , PROCESSING , MODELS , DEGRADATION , TEMPERATURE , SPACE TECHNOLOGY


Subject Categories : Electric Power Production and Distribution
      Unmanned Spacecraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE