Followup: PEC training method using STV...a bit long winded

May 28, 2003



#15438 May 28, 2003

Well, I got out again last night and there were a few scattered

clouds, so I thought I'd take the opportunity to try to get my

tracking down. I had loosened the gear 1 notch from the tightest I

had it without binding. I started tracking with the C11 and it was

looking OK, but not great. I realized I didn't shift the weight

east, so I moved my 10# weight about 2-3 inches to the east (I had a

10# and 20# to balance my C11) which is a little more than I had

normally done. I sat there and waited for the spikes to happen and,

gues what....they never did. I was getting great tracking,

averaging .6-1 arcsec average error with 3 second exposures on the

STV. I'm not sure if the looser gear or the greater eastward weight

shift did it, but I am now quite pleased. I tried PEC training

(after clearing the previous data) and it had a property where for

3/4 of the period it would be great and the other 1/4 horrible. Oh

well, the most important thing is the smooth tracking.

I decided to give M63 a go at f10 ( 1 arcsec/pixel) and got the

result at the top of my SXV-H9 page:

I wouldn't normally image at this resolution, but it was a great test!

If anyone has the magic decoder ring for PEC, I'd like to hear it.

I'll keep's not too difficult when guiding anyway.

Rick Krejci

Contact Us
This Site's Privacy Policy
Google's privacy policies