orbit library
TLE and NORAD SGP4/SDP4/SGP8/SDP8 Implementation for Dart and Flutter.
Classes
 Earth
 Represents Earth planet.
 EarthCenteredEarthFixed
 Earthcentered, Earthfixed is a cartesian spatial reference system that represents locations in the vicinity of the Planet (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.
 EarthCenteredInertial
 Earthcentered inertial (ECI) coordinate frames have their origins at the center of mass of Planet and are fixed with respect to the stars.
 Geodetic
 Encapsulates geocentric coordinates.
 KeplerianElements
 The Keplerian Elements.
 LookAngle
 Encapsulates topocentric coordinates.
 Orbit
 The main class to start orbit calculation.
 OrbitalState
 RV Pair for satellite state.
 Planet
 Abstract planet for calculations.
 SGP4
 SGP4 Calculator.
 Topocentric
 Topocentric parameters.
Functions

getMoonLocation(
DateTime utcNow) → LatLng  Calculates the Moon position on a given UTC time.

getSunLocation(
DateTime utcNow) → LatLng  Calculates the Sun position on a given UTC time.
Exceptions / Errors
 PropagationException
 Propagation Exception.