Comparison of astrometric and photogrammetric plate reduction techniques for a wild BC-4 camera
Astrometric and photogrammetric plate reduction techniques evaluated for error reduction in photographic satellite tracking
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Astrometric and photogrammetric plate reduction techniques evaluated for error reduction in photographic satellite tracking
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Optical synthetic simultaneous observations between Baker-Nunn stations - tables /data/
Radial velocity errors in high dispersion astronomical spectrographs in terms of variable spectral shifts along plate produced by mirror surface irregularities
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Electro-optical device converts high-frequency electrical pulses into permanent optical records on film. Accurate, well defined images are formed of electronic pulses having repetition rates greater than 10,000 pulses/sec and pulse widths of 20 microseconds or less. Small electronic switch drives a silicon carbide electroluminescent diode.
Data acquisition system translates and processes graphical information recorded on high speed photographic film. It automatically scans the film and stores the information with a minimal use of the computer memory.
Modification to geopotential models based on GEOS 1 and 2 optical tracking data
Focal plane shutter assembly composed of three mechanically separate rotary shutters permits exposure of three separated photographic films simultaneously with exposure time of 0.08 second. Exposure time is repeatable within 2 percent, uniformity of exposure over all three films is within 5 percent.
Shutter design consists of two axially mounted spring driven rotating blades with two lenses mounted between the blades. Features include excellent repeatability and flash synchronization. Design permits packaging in small volume and is beneficial where focal distance, magnification, and exposure time are fixed.
Mariner photometric data, examining variations in Martian surface limb darkening with reciprocity principle
Recordings of the stellar ultraviolet radiation in the wavelength region from 2000 to 4000 angstroms are reported. An analysis of the surface temperatures of the stars, the absorption effects occurring in the atmospheres of the stars, and the absorption effects of the interstellar dust is made from the photographic data obtained. In addition to gathering basic astrophysical data about hot, young stars, the experiment is used to clarify the problems and techniques of uv photography of stars from manned spacecraft.