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Observer location

Defining the observer location, or accessing properties thereof. More...

## Classes

class | supernovas::GeocentricObserver
| An observer location and motion, defined relative to the geocenter, such as for an Earth-orbit satellite, or for a virtual observer located at the geocenter itself. More...
class | supernovas::GeodeticObserver
| An observer location at a geodetic (longitude, latitude, altitude) location at the surface or above it (such as in an aircraft or on balloon). More...
class | supernovas::Observer
| An abstract observer location. More...
class | supernovas::Site
| An Earth-based (geodetic) observer site location, or a momentary airborne observer location. More...
class | supernovas::SolarSystemObserver
| An observer location anywhere in the Solar System, defined by its momentary barycentric position and velocity vectors. More...

## Detailed Description

Defining the observer location, or accessing properties thereof.

Observers may be placed anywhere on Earth, around Earth or anywhere in the Solar system. Earth-based observers have a defining geodetic location, which may be a fixed site on the ground (such as an observatory), or an instantaneous airborne location (such as an airplane or balloon observatory) and ground velocity. Observers may also be placed at virtual locations, such as the geocenter, or the Solar-system barycenter.