Re: PA Error what is acceptable for 530mm FL & 2.1arc sec/pix


Ray Gralak
 

Thank you Ray. I have a permanent pier in concrete that has been set up since 2013, so I do not believe it
shifts, especially since I have constructed it with steel Rebars in concrete.
There are two types of concrete: concrete that is cracked, and concrete that hasn't yet cracked. :-)

Yes, the ground can shift in a permanent setup like yours. Just not as quickly.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Shailesh Trivedi
Sent: Tuesday, September 28, 2021 6:37 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] PA Error what is acceptable for 530mm FL & 2.1arc sec/pix

Thank you Ray. I have a permanent pier in concrete that has been set up since 2013, so I do not believe it
shifts, especially since I have constructed it with steel Rebars in concrete.

Shailesh

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