Accession Number : AD0783631

Title :   Investigations to Provide Improved Glide Slope Operation during Periods of Ground-Plane Snow Cover. Volume II. Details of 1972-1973 Investigations.

Descriptive Note : Final rept. 1972-1973,


Personal Author(s) : Battistelli,J. J. ; McFarland,Richard H.

Report Date : APR 1974

Pagination or Media Count : 65

Abstract : The results of the 1972-73 Ohio University Snow Data Collection program for investigating the effects of ground-plane snow covers on image glide slopes are presented. The investigation involved the most extensive instrumentation to date for gathering continuous, detailed information on glide slope performance in both the near and far-fields. Experimental results were consistent with theory previously developed and provide a basis for some useful conclusions and recommendations, viz, effects of snow depth less than ten inches are not significant in terms of far-field performance. However, conventional near-field monitors may produce out-of-tolerance indications. Integral monitoring is found to provide excellent service and may be regarded as highly reliable and representative for depths up to at least 10 inches. For greater depths no conclusive, consistent data is yet available. (Author)

Descriptors :   *Glide path systems, *Glide slope, Environmental tests, Snow, Utilization

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE