You are absolutely right. I conflated the two programs. I meant GPS on BMs.

I may have scored an invite to the Mt. Wilson Observatory in a couple of weeks to set up my gear for a portion of a day. Because it involves Michelson...

astrodanco, post: 456257, member: 7558 wrote: In my opinion attempting conversions at this level of accuracy is futile. There are too many assumptions...

John, I looked up the four main points listed for the base survey work, and three of the four are still around. I haven't touched any BMs other than A...

Well, I think I have my results, but never having used HTDP before I'm not 100% certain.I started with my GPS observations at the Antonio BM (EV3805) ...

Since we've been discussing this subject the past few days, I thought I'd share an article that was just published this evening in the San Bernardino ...

Thought I heard it somewhere. I'm slow, but eventually catch on......

I agree with John in this case in regards to the straight line mark to mark distance being what I (and about 95 years ago, Dr. Michelson) want. That's...

Yep, it's mine. I linked to the main page it in my first post. Deja vu all over again....

Thanks for the pointers to HTDP. That looks like it will do what I need. Since there appears to be an accepted value for the light-line distance betwe...

Duh, my stupidity scares me sometimes as I have been known to operate heavy machinery. It's been a while since I reviewed all the documentation, but i...

Nice catch on the date of the Michelson benchmark. I just assumed when the NGS is listed as the reporting agency, they would have actually done someth...

The bench marks I'm interested in are shown on this web page in the yellow and red areas. NGS seems pretty clear which bench marks would be useful to ...

Mike, I know the point I chose isn't useful for the GPS on BM program, but I needed some points to practice on, including the submittal to OPUS Share....

BushAxe, I'm doing this stuff as a rather strange hobby, submitting under the GPS on Bench Marks program. Ultimately I'm planning on submitting on som...

Based upon the suggestions here I deleted the four most crappy satellites and forced OPUS to use some different CORS sites. I was able to drop my Long...

Thanks for all your suggestions. I'll play around with other CORS sites and see if I can improve it much. But the error is so large I don't hold out m...

Bah! Thought it was something simple.....Cartesian versus sorta spherical coords. I shoulda known that....Never mind......(but thanks, especially for ...