Astro-satpass

Changes for version 0.088_03 - 2018-01-26

Kelso marks Iridiums 3, 37, 49 as "P" ("partly operational"). This is "spare" in my classification. Sladen calls 3 failed, but I'm using the Kelso data in the canned status table in Astro::Coord::ECI::TLE.

New algorithm for equinoxes and solstices.
The previous algorithm was an iterative solution based on finding the time at which the ecliptic longitude of the Sun has the correct value.
The new algorithm is from Jean Meeus' "Astronomical Algorithms." 2nd edition, chapter 27 ("Equinoxes and Solstices"), and should be more accurate, at least for reasonably current times.
If you want the old algorithm back, you can set new attribute 'iterate_for_quarters' to a true value.
Correct typo in calculation of Sun's postion. The correction produced no change in the equinoxes and solstices calculated by iteration.
Add eg/usno-seasons. This displays equinoxes and solstices for a given year, both as computed by Astro::Coord::ECI::Sun and as downloaded from the United States Naval Observatory.

Overview of Astro::Coord::ECI and friends

Predict satellite passes over an observer.

Manipulate geocentric coordinates

Provide common methods without multiple inheritance.

Compute the position of the Moon.

Compute the position of a star.

Compute the position of the Sun.

Compute satellite locations using NORAD orbit propagation models

Compute behavior of Iridium satellites

Represent a set of data for the same ID.

Utility routines for astronomical calculations

To install Astro::Coord::ECI, copy and paste the appropriate command in to your terminal.

cpanm Astro::Coord::ECI

perl -MCPAN -e shell
install Astro::Coord::ECI

For more information on module installation, please visit the detailed CPAN module installation guide.

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