Photographic Photometry of Artificial Meteors |
Common terms and phrases
absolute meteor magnitude apparent magnitude artificial meteor artificial-meteor calibration curve relating camera field angle color index color-index correction comparison stars comparison-star images corrected catalog magnitudes correction factors data from station data-reduction process difference effective exposure effective irradiance energy per unit equation exposure values film plane front aperture half-exposure point ibration curve Initial Meteor Magnitudes Langley Research Center Light curve maximum exposure meteor and star meteor photometry meteor trail method of photometry microphotometer traces object space obtained optical station Optical-thickness coefficient panchromatic emulsions photographic emulsion photographic plate PHOTOMETRY OF ARTIFICIAL plate center producing a measurable radiant flux reciprocity-law failure reduction relating the transmittance relative shape function repeating shutter restricted method right ascension second calibration curve Selection of Comparison shown in figure spectral type star images stellar magnitudes stellar-magnitude scale streak image formed trailed image trailing velocity transformation transmittance at maximum unit path length visual magnitudes watts/meter2 zenith angle