Accession Number:

ADA021690

Title:

Investigation of Effects of Ground-Plane Deep Snow Cover on Image Glide Slope 1974-75.

Descriptive Note:

Final rept. Nov 74-Aug 75,

Corporate Author:

OHIO UNIV ATHENS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

• McFarland,Richard H.

Report Date:

1975-08-01

Pagination or Media Count:

38.0

Abstract:

Results of the tenth consecutive year of data collection concerning snow effects on operation of image glide-slope systems are presented. Evidence continues to show that with snow on the reflecting ground plane, the far-field glide slope does not lower rather it tends to rise approximately one-tenth of one degree elevation per one foot depth of snow. Further, the conventional near-field, 180 deg. point monitor response does not correlate with far-field path performance when snow covers the ground. A two-frequency, capture-type far-field monitor was tested. Conditions surrounding the collection of data on snow effects are severe enough to produce considerable noise in the data, and this prevents correlations that do exist from appearing in an elegant form.

Descriptors:

• *GLIDE SLOPE
• *GLIDE PATH SYSTEMS
• THICKNESS
• PILOTS
• DISPLAY SYSTEMS
• SNOW
• SNOW COVER
• ENVIRONMENTAL TESTS
• RUNWAYS
• AIRCRAFT LANDINGS
• DEEP DEPTH

Subject Categories:

• Air Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE