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Setting observatory and time
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astro
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Introduction
Contents
Ephemeris
Subsections
Setting observatory and time
Setting the observatory
Setting the time
Setting defaults
HEADER
command
Computing source positions
Source catalogs
Source selection
Solar system bodies
Precession
Plotting object positions
FRAME
definition
Plotting sun avoidance region
Plotting source or planet position
Constellations drawing
Observability bar charts
