Perpetual Nautical Almanac

Published by: RPA TECHNOLOGIES SL
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Description

Using the U.S. Naval Observatory NOVAS library and solar system ephemerides from JPL, high precision positions can be calculated in real-time from 1900 to 2050.
Simply select date and time and all values are recalculated instantly. The estimated elevation value is only needed for calculating sunrise/sunset, twilight, and moonrise/moonset.
The app provides the following functionalities:
*Aries: GHA position
*Sun:
-GHA/dec
- Astronomical dawn, nautical dawn, civil dawn, sunrise, sunset, civil dusk, nautical dusk, astronomical dusk, and meridian passage at Greenwich.
- Semidiameter
- Sunlight world map with the Sun and the Moon position.
*Moon:
- GHA/dec
- Moonrise/moonset and meridian passage at Greenwich.
- Semidiameter
- Moon phase and age of the Moon.
*Planets:
- GHA/dec for Venus, Mars, Jupiter, and Saturn.
*Stars:
- Magnitude, SHA/dec of 99 stars ordered by SHA.
*Corrections:
- Correction for the atmospheric refraction.
- Correction for the dip of the horizon.
- Parallax correction for the Moon, the Sun, Venus, and Mars.
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Perpetual Nautical Almanac FAQ

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    Yes, Perpetual Nautical Almanac is completely free and it doesn't have any in-app purchases or subscriptions.

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  • How much does Perpetual Nautical Almanac cost?

    Perpetual Nautical Almanac is free.

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Category Rankings
Chart
Category
Rank
Top Paid
38
Top Paid
48
Top Paid
55
Top Paid
56
Top Paid
92

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