RAPID DETERMINATION OF AURORAL HEIGHTS

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Abstract
A method using wide-angle cameras has been developed which reduces the time and labor required for the parallactic determination of auroral heights. The system consists of two wide-angle or "all-sky" cameras at a fixed separation of 21.65 km. Simultaneous photographs from the two stations are projected on a predetermined grid from which the parallax can be read directly. Heights on arcs and bands having well-defined borders can be found over a much greater length than before and with comparative ease. The system is particularly useful during the flight of rockets into aurora and for studies of height versus any other measurable property of aurora. The accuracy obtainable is approximately ± 3%.

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