Fwiw, I didn't mind the refresher on the optics. I didn't really know, for example, what the Schmidt Plate was all about. https://en.wikipedia.org/wiki/Schmidt_corrector_plate
On Sat, Oct 16, 2021 at 2:19 PM Michael Rasmussen <mich...@jamhome.us> wrote: > > > Skip the automation of how telescopes are designed and get to the really > interesting bit on how it happens. Fascinating. > > --- > Michael Rasmussen, Portland Oregon > Be Appropriate && Follow Your Curiosity > > On 2021-10-16 13:22, Russell Senior wrote: > > Here's a nice video on the novel telescopic lens on the normal (i.e. > > not the Cirrus Flux Camera) camera on our satellite: > > > > https://www.youtube.com/watch?v=HxwhCmO90UQ > > > > s/University of Portland/Portland State University/g > > > > On Thu, Oct 7, 2021 at 9:50 PM Russell Senior > > <russ...@personaltelco.net> wrote: > >> > >> As promised, here are my slides from the talk (with links): > >> > >> https://personaltelco.net/~russell/plug-talk-2021-10-07.pdf > >> > >> On Thu, Oct 7, 2021 at 8:57 AM Michael Dexter <dex...@pdxlinux.org> > >> wrote: > >> > > >> > Portland Linux/Unix Group General Meeting Announcement > >> > > >> > Who: Russell Senior > >> > What: Russell's Excellent High Altitude Balloon Adventure > >> > Where: https://meet.jit.si/pdxlinux > >> > When: Thursday, October 7th, 2021 at 7pm > >> > Why: The pursuit of technology freedom > >> > > >> > Russell volunteers with the Portland State Aerospace Society's (PSAS) > >> > OreSat program as an Industry Advisor. PSAS is a rocket club at > >> > Portland State University. The OreSat program works towards having > >> > small interactive satellites put into orbit by friendly launch > >> > services. OreSat currently consists of three small satellites based on > >> > a common design, the first one is due to launch in January. Russell's > >> > role is to help out with a system called dxwifi, a long distance > >> > S-band communication link. The goal is for ground-based student groups > >> > around the state to receive live video broadcast from orbit as the > >> > satellite passes overhead. Earlier this year, a high school student > >> > applied and got our satellite a ride on a high altitude balloon > >> > through a NASA program. One of the goals was to capture wifi data > >> > being transmitted by the payload. Because of the distances involved, > >> > this requires aiming a directional antenna at the balloon. This talk > >> > will tell the story of how Russell waded his way towards a solution > >> > using math, some hand tools, open-source software and some ingenuity. > >> > > >> > About Russell: > >> > > >> > Russell has been a Linux user since 1992. He worked for a few decades > >> > doing data management, programming, and analysis for a small > >> > scientific consulting firm. Since 2005 he has been deeply involved in > >> > the Personal Telco Project and trying to bring about > >> > telecommunications policy in the users interests, while also hacking > >> > on router firmware. Since 2018, he's been involved in an effort to > >> > bring at-cost fiber infrastructure to the Portland metro area, > >> > Municipal Broadband PDX. > >> > > >> > > >> > PLUG is open to everyone and does not tolerate abusive behavior on its > >> > mailing lists or at its meetings. > >> > > >> > PLUG Page with information about all PLUG events: http://pdxlinux.org/ > >> > Follow PLUG on Twitter: http://twitter.com/pdxlinux > >> > > >> > Michael Dexter > >> > PLUG Volunteer
