Read pterrors file (pterrors, run with no options),
Plots sky coverage, and HA, d errors in polar plots

Note: This allows plotting of HA/d errors using telescoped.mesh files

Some constants

Read pterrors file, load arrays

May 28 mesh

Define coordinate converson functions

Calculate Azim, Elevation, Az/el errors from HA, Dec

Calculate Azim/ Elevation errors in arcmin (identical to output of pterrors -ac)

DAZ errors are sky angles

Correct HA errors so they are sky angles

Plot sky coverage in azim.-elevation coordinates

Plot sky coverage in HA, d view

Plot azimuth errors

Elevation errors

RMS Errors