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    Re: Celnav apps for Android
    From: Andrés Ruiz
    Date: 2015 Mar 4, 10:49 +0100
    Lunars added to the Nautical Almanac app.
    All are free except Nautical Almanac.
    For your information Google Play gets the 30% of the sales. The money I get is donated to the Vicente Ferrer Foundation.

    Available on the app store:

    • Equatorial geocentric coordinates: RA/GHA, Declination for Sun, Moon, and navigational stars and planets . SHA.
    • SD, HP
    • SHA
    • Visible sky: identification of stars and planets - it plots the visible sky from a position. Polar & horizon chart
    • Planning observation: phenomena - Twilight, - Rise/set for Sun and Moon, - Meridian passage
    • Solar time: GAT, LAT, LMT, Equation of time
    • Sidereal time (Aries): GHA, GAST, LAST, LHA
    • Lunar distances
    • Under development: SSD, ...
    • Latitude by Polaris
    • Noon sight
    • Sun ex-merian sight
    • Time sight for the Sun
    • Latitude by the Sun´s Altitude and Time
      • Observed altitude Ho by nautical almanac data
      • Local hour angle (LHA)
      • Marcq Saint Hilaire Line of Position, intercept method (p=Ho-Hc, Zn)
      • Plot of the LoP
        • Variation for the current day. (Local magnetic variation or magnetic declination)
        • WMM2015 - World Magnetic Model 2015
        • It calculates the two solutions, and plots the circles of position, or circles of equal altitude on a google map.
        • Running fix
        • Method explained in the papers:
          • Vector Solution for the intersection of two Circles of Equal Altitude.
          • Use of rotation matrices to plot a circle of equal altitude.

        Andrés Ruiz
        Navigational Algorithms
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