Dear all,

I've found something odd about Guide that I hope someone may be able to answer.

When I've checked the "Show ground" toggle in the Settings | Background dialog,
the horizon, as defined by the edge of the coloured ground, lies some 54 minutes
of arc lower in apparent altitude, that does the blue horizon line which shows
when the "Show ground" is off.

Why is this? Correction for refraction?

Best regards,

Arild :)

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