Last seen: April 9, 2026 5:20 pm
<img src=""http://"<img class="go2wpf-bbcode" src="alt="" />" alt="">I just held my iPhone 6 to the eyepiece ...
<img src=""http://"" alt="" /> <img src=""http://"<img class="go2wpf-bbcode" src="alt="" />" alt=""&g...
<img src=""http://"<img class="go2wpf-bbcode" src="alt="" />" alt="">
Static baseline GPS is the gold standard of phase differential GPS. Which returns a vector (delta XYZ phase center to phase center) post processed. Ub...
<img src=""http://"<img class="go2wpf-bbcode" src="alt="" />" alt=""> When I shot the moon I unfocused the cr...
I contacted NIST, fee for service is $500, 8 reference points, 200 ft. and offered up to 400 ft max. additional charges. I've never heard of a km long...
New, NIST calibrated, are expensive. Maybe there's a closet chain that some one doesn't need. I'm looking for a good check-chain. I don't need a new 1...
Good question about non-GPS chronometers. Proper celestial nav would have to include all of the steps, including an approved time source.
Q: did you check the file size realtime? Was there data on Friday?If the unit boots with current settings and locks on sats quickly, then it retains e...
Sounds like file might have tabs. If I open a rinex to edit something (station ID) I make sure that "no tabs" is set in my editor.Reconvert the file.
No. Leap year, leap second, are completely independent of GPS. Even pre 2000 firmware still works fine.
Achieving a one second 'true' angle' isn't a stretch, it's just time consuming. Number one error: never trust a tribrach.Easy to remember: 2mm @ 200M ...
For the most part, using a landmark for azimuth on paying work is about obsolete. GPS has done that in. It's just the art of the field work, and then ...
I realize that there is always the risk of positive ID of far off points. To that end usually there are more than one tower/tank/structure to choose f...
Do you have access to T2? Do you know where an NGS disc is that you can occupy? Maybe a radio tower with published coordinate in view?a few months ago...
By coincidence I was just running thru the calculations for hour angle azimuth - sun, Polaris. I highly recommend doing so with pencil paper and an HP...
Raise Your Hand If You Have Used A Subtense BarI have a wild 2m bar. I spent a several days figuring it out, making repeated measurements with a T2. A...