Anweisungen für die photographischen Aufnahmen der leuchtenden Nachtwolken - 103 years on.

Details Anweisungen für die photographischen Aufnahmen der leuchtenden Nachtwolken - 103 years on. Anweisungen für die photographischen Aufnahmen der leuchtenden Nachtwolken - 103 years on.

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jatp...56..447g&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, Vol. 56, No. 4, p. 447 - 459

Physics

5

Noctilucent Clouds: Methods Of Observation, Noctilucent Clouds: Heights

Scientific paper

One hundred and three years ago, Jesse published the first manual for noctilucent cloud observing and gave details of measuring photographs to obtain accurate estimates of their heights. The authors give a brief review of the measurements published since then and discuss the different methods that have been used for height measurement using pairs of photographs taken from ground level. Using the methods on data derived from two pairs of photographs taken in Scotland during the years 1983 and 1986 illustrates the deficiencies and advantages of the different methods. The authors' recommended method, the so-called "surface" method, is adapted to the use of desktop computers. In it, the photograph from observatory A is redrawn in the field-of-view of observatory B by making an assumption about the height of the noctilucent clouds. The assumed height is altered until the form and position of the NLCs redrawn in B's field-of-view match best the form and position of the NLCs observed from B. Also vice versa, that is to say the redrawing of B's NLCs into the field-of-view of observatory A. Since the selected height should be the same for both transformations, the statistics of the height estimates allow an estimate of the precision of the height estimates.

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