Thanks Roland. I understand the difference more clearly now. Very helpful. Lee

Nice picture! Lee

#Mach2GTO

Bill- What an interesting and entertaining article. I was not aware of Microsoft's actions, especially since our government has been ineffective in addressing the problem. ' Lee

Worsel, Thanks for the reply. I think what was particularly bothering me was the large temperature dependence in the correction equation that I was using to get from barometric pressure to absolute pr

Thanks for the reply Dale. Using data from https://www.mide.com/air-pressure-at-altitude-calculator, I come up with a correlation at my altitude of P(mbar) = BARO (inHg) x 3.5599 x (T(C) +273.15)^0.34

I am at a loss to understand the details of the pressure required for the APPM model, and how some folks are getting that from the local weather report. The APPM model asks for "pressure" in mbar. My

Neat! Lee

Forgive my ignorance, but what is the reason for wanting a fan-less mini-PC. Is it power consumption, vibration, air currents (but there will be thermal currents regardless), or something else? With w

Thanks Howard, George, and Ray for the help with using APPM and APCC to get a model for pointing and tracking with my AP 1100GTO mount. After several weeks of effort, it saw "first light" last night,

Thanks Howard. Your suggestion worked for letting me run APPM as administrator. Sorry for my ignorance with Windows 10. I hope to make it out to the observatory to check it out this evening. It now do

Ray Gralak (or others), A fellow named Jeff Kraehnke wrote to the forum in June, 2020 with the concern that he could not get APPM to talk with TheSkyX. He was getting an ActiveX error. I have exactly