Digging deeper, Astro::SpaceElevator
(from 2007), was broken by
deprecation of the two-argument form of azel in Astro::Coord::ECI
in 2013 (replaced by azel_offset in 2011).
0.043 2011-08-29 T. R. Wyant
Provide an Astro::Coord::ECI azel_offset() method, which takes, as its
optional second argument, an offset applied to the elevation, in
terms of the apparent radius of the body whose position is being
calculated. The two-argument version of the azel() method is now
deprecated, and will begin warning in the first release after March
0.057 2013-07-08 T. R. Wyant
* The two-argument form of azel() is now fatal.