A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S
During development on radio terrain clearance indicators, work was done to measure the reflection coefficients from terrains expected to have the lowest values. The measurements were made at 1600 mc. They depended upon the reception in an aircraft flying over the terrain, of a signal transmitted ver...
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ftdtic:AD0007039 2023-05-15T14:56:15+02:00 A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S GARLICK, J. K. CENTRAL RADIO BUREAU LONDON (UNITED KINGDOM) 1953-01 text/html http://www.dtic.mil/docs/citations/AD0007039 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0007039 en eng http://www.dtic.mil/docs/citations/AD0007039 Approved for public release; distribution is unlimited. Document partially illegible. DTIC Flight Control and Instrumentation *GROUND POSITION INDICATORS UNITED KINGDOM TERRAIN REFLECTION SNOW ICE FLIGHT COEFFICIENTS VEGETATION DESERTS ARCTIC REGIONS FEET SEA CLUTTER AIRCRAFT SAND FOREIGN REPORTS Text 1953 ftdtic 2016-02-22T18:18:05Z During development on radio terrain clearance indicators, work was done to measure the reflection coefficients from terrains expected to have the lowest values. The measurements were made at 1600 mc. They depended upon the reception in an aircraft flying over the terrain, of a signal transmitted vertically downwards from the aircraft and reflected back to it. The reflection coefficient of desert sand, 0.15 for an assumption of 0.85 for sea, was in agreement with a previously reported value at 400 mc and was considered to be the lowest reflection coefficient to be found from any natural terrain. Measurements over barren, frozen, arctic terrain or sea covered by several feet of ice produced reflection coefficients equal to those from desert sand. However, over terrain deeply frozen and covered by deep snow and vegetation, appreciably smaller reflection coefficients were measured. Text Arctic Defense Technical Information Center: DTIC Technical Reports database Arctic |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Flight Control and Instrumentation *GROUND POSITION INDICATORS UNITED KINGDOM TERRAIN REFLECTION SNOW ICE FLIGHT COEFFICIENTS VEGETATION DESERTS ARCTIC REGIONS FEET SEA CLUTTER AIRCRAFT SAND FOREIGN REPORTS |
spellingShingle |
Flight Control and Instrumentation *GROUND POSITION INDICATORS UNITED KINGDOM TERRAIN REFLECTION SNOW ICE FLIGHT COEFFICIENTS VEGETATION DESERTS ARCTIC REGIONS FEET SEA CLUTTER AIRCRAFT SAND FOREIGN REPORTS GARLICK, J. K. A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
topic_facet |
Flight Control and Instrumentation *GROUND POSITION INDICATORS UNITED KINGDOM TERRAIN REFLECTION SNOW ICE FLIGHT COEFFICIENTS VEGETATION DESERTS ARCTIC REGIONS FEET SEA CLUTTER AIRCRAFT SAND FOREIGN REPORTS |
description |
During development on radio terrain clearance indicators, work was done to measure the reflection coefficients from terrains expected to have the lowest values. The measurements were made at 1600 mc. They depended upon the reception in an aircraft flying over the terrain, of a signal transmitted vertically downwards from the aircraft and reflected back to it. The reflection coefficient of desert sand, 0.15 for an assumption of 0.85 for sea, was in agreement with a previously reported value at 400 mc and was considered to be the lowest reflection coefficient to be found from any natural terrain. Measurements over barren, frozen, arctic terrain or sea covered by several feet of ice produced reflection coefficients equal to those from desert sand. However, over terrain deeply frozen and covered by deep snow and vegetation, appreciably smaller reflection coefficients were measured. |
author2 |
CENTRAL RADIO BUREAU LONDON (UNITED KINGDOM) |
format |
Text |
author |
GARLICK, J. K. |
author_facet |
GARLICK, J. K. |
author_sort |
GARLICK, J. K. |
title |
A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
title_short |
A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
title_full |
A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
title_fullStr |
A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
title_full_unstemmed |
A SURVEY OF LOW REFLECTION COEFFICIENTS FOR VARIOUS TYPES OF LAND AND FROZEN SEA FOR NORMAL INCIDENCE AT 1600 MC/S |
title_sort |
survey of low reflection coefficients for various types of land and frozen sea for normal incidence at 1600 mc/s |
publishDate |
1953 |
url |
http://www.dtic.mil/docs/citations/AD0007039 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0007039 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/AD0007039 |
op_rights |
Approved for public release; distribution is unlimited. Document partially illegible. |
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1766328272239460352 |