SP3 format file I/O

Classes
class	SP3Base
	This class is here to make readable inheritance diagrams. More...
class	SP3Data
	This class encapsulates data for satellite orbits and clocks, including positions, velocities and other orbit and estimation information read as found in I/O of SP3 format (versions a, b, or c) files. More...
class	SP3Header
	This class models the header for a SP3 file. More...

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