Tag Archives: Rapid Sight Reduction

Accuracy of Sight Reduction Methods.

In my recent article ‘Why Astro‘, I highlighted the risks in using the GPS.  Since writing that article, I am frequently asked “if astro / celestial navigation is to be used, which of the many systems is the best”.  Sight … Continue reading

Posted in astro navigation, celestial navigation, global positioning system, gps, Marine Navigation, mathematics, navigation, spherical trigonometry, trigonometry | Tagged , , , ,

Planning Star and Planet Observations

I have been asked about using ABC tables to calculate azimuth and altitude when planning star and planet observations.  Unlike the Sun and the Moon which are easily identified, the approximate positions of stars and planets need to be established … Continue reading

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