A NEW INSTRUMENT FOR THE DETERMINATION OF ASTRONOMIC POSITION

A NEW DETECTION CONCEPT IS DESCRIBED WHICH PROMISES AUTOMATIC DETERMINATION OF ASTRONOMIC POSITION AND AZIMUTH. IMPLEMENTATION OF THIS CONCEPT RESULTS IN A PORTABLE SENSOR- COMPUTER COMBINATION WHICH PERFORMS THE DETECTIONS AND CALCULATIONS IN LESS THAN AN HOUR. THE SENSOR OPERATES WITH NO MOVING PARTS DURING THE MEASUREMENT SEQUENCE. STARS ARE DETECTED BY THEIR TRANSITS ACROSS A FAN OF RADIAL SLITS PLACED AT THE FOCAL SURFACE OF A VERTICALLY ORIENTED OPTICAL SYSTEM. POSITION DETERMINATION IS BASED ON THE AZIMUTH TECHNIQUE. USE OF THIS METHOD ELIMINATES THE REQUIREMENT FOR CORRECTIONS DUE TO RADIAL ABERRATIONS AND DISTORTIONS OF THE OPTICAL SYSTEM, AND TO ATMOSPHERIC REFRACTION. THE CLASSICAL METHOD OF REVERSAL CANCELS ALIGNMENT ERRORS. ELECTRONIC LEVEL SENSING COMPLETES THE FULLY AUTOMATED SYSTEM. PRINCIPAL ADVANTAGES ARE: (1) IMPERSONAL DETECTION, (2) NO REQUIREMENTS FOR CONTINUOUS RELEVELING, (3) NO REQUIREMENTS FOR AZIMUTH STABILITY IF AZIMUTH DRIFT IS MATHEMATICALLY DEFINABLE, (4) POSITION FIX AND FIX QUALITY AVAILABLE ON-SITE, AND (5) REDUCTION OF STATISTICAL ERRORS THROUGH COMPUTERIZED DATA PROCESSING TECHNIQUES. EVERY EFFORT POSSIBLE HAS BEEN MADE TO CREATE RELATIVE FREEDOM FROM SYSTEMATIC ERRORS WHICH HAVE PLAGUED PAST INSTRUMENTS. ACCURACY IS POTENTIALLY FIRST ORDER. /AUTHOR/

  • Supplemental Notes:
    • Vol 29, No 3, PP 447-461, 13 FIG, 20 REF
  • Authors:
    • Carroll, J E
  • Publication Date: 1969-9

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Filing Info

  • Accession Number: 00202800
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 12 1970 12:00AM