From aa98ca6992052d249763b3b4521b6b0aa465fc63 Mon Sep 17 00:00:00 2001
From: Jeff Moe <moe@spacecruft.org>
Date: Tue, 14 Jun 2022 14:08:21 -0600
Subject: [PATCH] Ground station notes

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 README.md | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)

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 # Spacecruft Galmon
 Notes on setting up galmon.eu ground stations.
 
+# Galmon
+Galmon is a system to monitor GNSS.
+Ground stations on Earth use `galmon` software to collect data
+from each GNSS satellite.
+
+Main website:
+
 * https://galmon.eu
 
+Source code:
+
+* https://github.com/berthubert/galmon
+
+GNSS:
+
+* https://en.wikipedia.org/wiki/Satellite_navigation#Global_navigation_satellite_systems
+
+
+# Ground Stations
+There are two main GNSS chipsets that the `galmon` software support.
+UBX and Septentrio.
+The former is more widely used and easier to set up.
+This doc covers just the latter for now.
+
+## Septentrio
+The Septentrio device is available as apparently very high quality
+standalone (unobtanium?) hardware that can plug directly into ethernet,
+amongst other configurations. Septentrio also resells their chips to
+third party integrators that make their own more readily available
+boards, such as the one used in the following setup.
+
+Septentrio website:
+
+* https://www.septentrio.com
+
+Ardusimple simpleRTK3B with Septentrio mosaic-X5.
+
+* https://www.ardusimple.com/product/simplertk3b-x5/
+
+Manufacturer's part number:
+
+* AS-RTK3B-MX5-L125-NH-00
+
+Not sold by Sparkfun, adafruit, or Digikey. Mouser part number:
+
+* 780-ASRTK3BMX5L125NH
+
+
+# Status
+Three ground stations running.
+
+
+simpleRTK2B-mPCIe, puck antenna, low in canyon.
+
+* https://galmon.eu/observer.html?observer=189
+
+simpleRTK2B USB, Calibrated Survey GNSS Tripleband + L-band antenna,
+higher in canyon.
+
+* https://galmon.eu/observer.html?observer=192
+
+Septentrio. simpleRTK3B. Calibrated Survey GNSS Tripleband + L-band antenna,
+higher in canyon.
+
+* https://galmon.eu/observer.html?observer=201
+
+
+# License / Copyright
+Source:
+
+* https://spacecruft.org/spacecruft/spacecruft-galmon
+
+Unofficial project, not part of official `galmon` software or website.
+Upstream sources under their respective copyrights.
+
+Copyright (C) 2022 Jeff Moe.
+
+License: CC-By-SA 4.0 International or any later version.
+