Radar mile: Difference between revisions
m change U+00B5 to U+03BC (μ) per Unicode standard and MOS:NUM#Specific units - see Unicode compatibility characters (via WP:JWB) |
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'''Radar mile''' or '''radar nautical mile''' is an auxiliary constant for converting a (delay) time to the corresponding scale distance on the [[radar]] display.<ref>{{cite web|title=NEETS - Naval Electrical Engineering Training Serie|periodical=|publisher=|url=https://www.tpub.com/neets/book18/79a.htm|url-status=|format=|access-date=2020-12-31|archive-url=|archive-date=|last=|date=|year=|language=|pages=|quote=}}</ref> |
'''Radar mile''' or '''radar nautical mile''' is an auxiliary constant for converting a (delay) time to the corresponding scale distance on the [[radar]] display.<ref>{{cite web|title=NEETS - Naval Electrical Engineering Training Serie|periodical=|publisher=|url=https://www.tpub.com/neets/book18/79a.htm|url-status=|format=|access-date=2020-12-31|archive-url=|archive-date=|last=|date=|year=|language=|pages=|quote=}}</ref> |
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Radar timing is usually expressed in microseconds. To relate radar timing to distances traveled by radar energy, |
Radar timing is usually expressed in microseconds. To relate radar timing to distances traveled by radar energy, speed of waves nautical mile , the : |
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:<math>1~\text{radar mile} = \frac{2 \cdot 6080~\mathrm{ft}}{984~\mathrm{ft~per~microsecond}}= 12{,}35~\text{μs}</math> |
:<math>1~\text{radar mile} = \frac{2 \cdot 6080~\mathrm{ft}}{984~\mathrm{ft~per~microsecond}}= 12{,}35~\text{μs}</math> |
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:<math>\text{range} = \frac{\mathrm{elapsed~time}}{\mathrm{radar~mile}}=\frac{t_d}{12{,}35~\text{μs}}</math><ref>{{cite web|title=Radartutorial|periodical=|publisher=C. Wolff|url=https://www.radartutorial.eu/01.basics/Radar%20Nautical%20Mile.en.html|url-status=|format=|access-date=2021-01-01|archive-url=|archive-date=|last=|date=November 1998|language=|pages=|quote=}}</ref> |
:<math>\text{range} = \frac{\mathrm{elapsed~time}}{\mathrm{radar~mile}}=\frac{t_d}{12{,}35~\text{μs}}</math><ref>{{cite web|title=Radartutorial|periodical=|publisher=C. Wolff|url=https://www.radartutorial.eu/01.basics/Radar%20Nautical%20Mile.en.html|url-status=|format=|access-date=2021-01-01|archive-url=|archive-date=|last=|date=November 1998|language=|pages=|quote=}}</ref> |
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== References == |
== References == |
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Revision as of 03:11, 22 October 2024
Radar mile or radar nautical mile is an auxiliary constant for converting a (delay) time to the corresponding scale distance on the radar display.[1]
Radar timing is usually expressed in microseconds. To relate radar timing to distances traveled by radar energy, the speed is used to calculate it. With speed of radar waves at approximately 299,792,458 metres per second (984 feet per microsecond) and nautical mile at 1,852 metres (6,080 ft), the delay per nautical mile until the wave return is calculated as:
A pulse-type radar set transmits a short burst of electromagnetic energy. The target range is determined by measuring elapsed time while the pulse travels to and returns from the target. Because two-way travel is involved, a total time of 12.35 microseconds per nautical mile will elapse between the start of the pulse from the antenna and its return to the antenna from a target in a range of 1 nautical mile. In equation form, this is:
References
- ^ "NEETS - Naval Electrical Engineering Training Serie". Retrieved 2020-12-31.
- ^ "Radartutorial". C. Wolff. November 1998. Retrieved 2021-01-01.
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