<div dir="ltr"><div>Ah yep -- we ended up skipping last Monday due to scheduling issues, but we should be meeting again at NB on Tuesday evening (Jul 25th).<br><br>I'll update the wiki until we get a confirmed schedule<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 22 July 2017 at 10:56, Jeff Luszcz <span dir="ltr"><<a href="mailto:jeff@luszcz.com" target="_blank">jeff@luszcz.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Thanks for the update, I was at noise bridge last Monday but seemed to miss the group.<div><br></div><div>I have a junk box of amateur radio equipment / cables / tools that might be helpful.</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Jeff</div></font></span><div><div class="h5"><div><br><div><blockquote type="cite"><div>On Jul 22, 2017, at 10:08 AM, James Addison <<a href="mailto:jay@jp-hosting.net" target="_blank">jay@jp-hosting.net</a>> wrote:</div><br class="m_5769508664119683325Apple-interchange-newline"><div><div dir="ltr"><div><div><div>Responses to a couple of our TODOs:<br><br><br></div><b>Historic weather/wind<br></b></div><div>Weather underground has some really nice historic reports from personal weather stations here:<br><br><a href="https://www.wunderground.com/personal-weather-station/dashboard?ID=KCASANFR79#history/s20160721/e20170722/myear" target="_blank">https://www.wunderground.com/p<wbr>ersonal-weather-station/dashbo<wbr>ard?ID=KCASANFR79#history/s201<wbr>60721/e20170722/myear</a><br></div><div><br></div><div>tl;dr - wind speed average 5mph, rarely sustained over 15mph. Gusts typically peak around 25mph, but record gust of 45mph (!). Mostly from WSW direction (from where Yamo is towards NB)<br></div><div><br></div><br><b>Motor types</b><br>SATNOGs seem to be moving towards DC motors[0] -- evidently the previous NEMA17 stepper motors were introducing a lot of noise[1][2]; I'd suggest we follow the trend and opt DC too?<br><br>The build steps are mostly the same, and the differences are called out in the V3 assembly guide[2].<br><br>[0] - <a href="https://community.libre.space/t/v3-build-dc-motor-vs-stepper-nema-17/750/2" target="_blank">https://community.libre.space/<wbr>t/v3-build-dc-motor-vs-stepper<wbr>-nema-17/750/2</a><br>[1] - <a href="https://community.libre.space/t/interference-from-stepper-motors/81" target="_blank">https://community.libre.space/<wbr>t/interference-from-stepper-mo<wbr>tors/81</a><br>[2] - <a href="https://community.libre.space/t/rf-shileding-and-interference-from-steppers/235" target="_blank">https://community.libre.space/<wbr>t/rf-shileding-and-interferenc<wbr>e-from-steppers/235</a><br>[2] - <a href="https://satnogs.dozuki.com/Guide/SatNOGS+Rotator+v3+Mechanical+Assembly/7" target="_blank">https://satnogs.dozuki.com/Gui<wbr>de/SatNOGS+Rotator+v3+Mechanic<wbr>al+Assembly/7</a><br><br><br></div>PS: Nice video timelapse of rotator construction here - <a href="https://www.youtube.com/watch?v=D6P9HK23Gmo&t=396s" target="_blank">https://www.youtube.com/watch?<wbr>v=D6P9HK23Gmo&t=396s</a><br></div><div class="gmail_extra"><br><div class="gmail_quote">On 9 July 2017 at 17:03, Patrick O'Doherty <span dir="ltr"><<a href="mailto:p@trickod.com" target="_blank">p@trickod.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey folks,<br>
<br>
A number of folks in the community are gathering together with the aim<br>
of building a SatNOGS[0] groundstation to be housed at 2169 Mission St.<br>
<br>
Some of us gathered this morning to get things underway, below are the<br>
summary meeting notes and outstanding TODO items that we walked away with.<br>
<br>
Our next gathering will be Monday July 17th at Noisebridge ~7pm onwards.<br>
It's our hope that this Monday evening time will suit people for weekly<br>
meetings. If you're interested in hearing more about the project or<br>
helping out then please do come along! We're also going to document our<br>
progress on the wiki[1]<br>
<br>
TODOS:<br>
* Investigate reviving Peter's weather station hardware to mount on the<br>
roof to gather wind information<br>
* Look at historical weather data for SF to get windspeed maximums over<br>
the last while so that we can safely assess mounting an antenna.<br>
* Research the motor types most commonly used by other SatNOG builds in<br>
their rotator assembly.<br>
* Check out the power and networking situation on the roof<br>
* Document the power supply points on the roof<br>
* Estimate the laser's electrical load to understand how much<br>
capacity we have<br>
* Estimate the power requirements for the entire SatNOGS build.<br>
* Start a BOM spreadsheet for each component to help gather components.<br>
* 3D print the gears required in the rotator assembly.<br>
* Laser cut some acrylic sheets to seal the walls of the rotator assembly.<br>
* Research how multi-antenna setups might work with SatNOGS<br>
<br>
Hope to see folks at the space next Monday!<br>
<br>
cheers,<br>
<br>
p<br>
<br>
[0] - <a href="https://satnogs.org/" rel="noreferrer" target="_blank">https://satnogs.org</a><br>
[1] - <a href="https://noisebridge.net/wiki/SatNOGS" rel="noreferrer" target="_blank">https://noisebridge.net/wiki/S<wbr>atNOGS</a><br>
<br>
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