Celestial Navigation slide rule demo
Автор: T. Hudson
Загружено: 2026-02-10
Просмотров: 409
Описание:
Computing position and time from sextant observations using a circular sliderule. More info: https://trmm.net/sunwheel
Interactive versions of the sliderules: https://osresearch.github.io/sunwheel... and https://osresearch.github.io/sunwheel...
Printable versions: https://osresearch.github.io/sunwheel... and https://osresearch.github.io/sunwheel...
00:00 Intro
00:27 Correcting noon sextant height and computing zenith angle
02:24 Computing declination at time of observation
03:37 Computing latitude from declination and zenith angle
04:31 Plotting latitude on chart
05:21 Computing Global Hour Angle of noon sight and approximate longitude
06:38 Correcting afternoon sextant height to observed height Ho
07:37 Computing local hour angle of afternoon sight
10:35 Computed Height Hc for Assumed Position and LHA
13:23 Computed Bearing Z for AP and LHA
16:03 Plotting intercept using Hc-Ho and Z
19:08 Lunar Time introduction
19:36 Sun observation corrections
21:05 Lunar observation semidiameter and parallax corrections
24:35 Lunar distance correction for semidiameter
27:29 Lunar distance correction for parallax and refraction using spherical triangle
31:26 Lunar time interpolation
33:14 Conclusion
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