v1.13.1

• Add new SmartLocationPredictor which uses SciPy to achieve better performance and accuracy
• Allow change of tolerance for pass finding
• Fix corner case in eclipse computation

v1.12.0

• Require sgp4>=2.3
• Use mean Earth radius for illumination computation
• Use current date if not given in get_only_position too
• Document mean_motion (finally!)
• Add R_E_MEAN_KM, ALPHA_UMB and ALPHA_PEN constants
• Add period property to predictors
• Add get_shadow, get_eclipse_duration, get_beta, get_normal_vector
  and eclipses_since methods to predictors
• Make sate_id mandatory and source optional

v1.10.0

• Add get_shadow method that computes if a satellite is in shadow
• Add get_sun method that retrieves the ECI position of the Sun
• Add elevation and groundtrack generic APIs
• Rename LocationPredictor.propagator to predictor for clarity
• Make HighAccuracyTLEPropagator.propagator private
• Document Position.position_llh
• Add version to __init__.py
• Make propagate_eci public
• Raise error if propagation failed
• Fix J2Predictor.from_tle for non-epoch dates
• Add method to create predictor with repeating groundtrack
• Support Python 3.8
• Remove mentions to deprecated "precise" predictor

v1.9.0

• First Python-3 only release!
• Deprecated HighAccuracyTLEPredictor class, removed non-precise algorithm
• Added new Keplerian and J2 predictors based on classical orbital elements
• Added functions to create sun-synchronous satellites and planar constellations
• Added new NoradTLESource
• Fix off-nadir angle calculation
• Allow custom locations using an environment variable
• Do not round the microseconds internally, achieve much higher precision (validated against STK)

new Keplerian and J2 predictor

• new Keplerian and J2 predictor
• minor fixes

First public release

v1.8.4

first public release