Quote:
Originally Posted by gary
Hi Les,
With the Milky Way often at the zenith here, I suspect that an apples to apples comparison is often not going on when comparing readings from these devices from locations in North America to locations in Australia simply because of the Milky Way surface brightness.
Best regards
Gary
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Hi Gary,
I have no doubt you are 100% correct with this assumption. I have had nights of outstanding observing conditions and still only obtained readings in the 21.5 to 21.7 range because of the Milky Way brightness. The sky quality on those nights correlated to higher readings than what could be obtained on the SQM. As you are probably aware my SQM is the older model which is more affected by Milky Way Glow than Les's newer model. You were at Coona the night I got those repeatable readings in the 21.85 to 21.9 range and you would have to agree they were outstanding observing conditions, which you don't encounter all that often.
Cheers,
John B