diff --git a/operator.md b/Operator.md
similarity index 64%
rename from operator.md
rename to Operator.md
index 1f4fedf..9a8419f 100644
--- a/operator.md
+++ b/Operator.md
@@ -1,24 +1,28 @@
 Hi!
 
-Many thanks for joining the galmon.eu project as a station operator! 
+Many thanks for joining the galmon.eu project as an observer and station operator! 
 
-Here are some things to think about:
+Here are some ground rules to follow once you have locally tested your galmon station:
 
  * Please ask bert@hubertnet.nl or [ahu on
    IRC](https://webchat.oftc.net/?channels=galileo) or
-   [@PowerDNS_Bert](https://twitter.com/PowerDNS_Bert) for a station id. 
- * Please do not randomly pick a station ID!!
+   [@PowerDNS_Bert](https://twitter.com/PowerDNS_Bert) for a station ID. 
+ * Please do not randomly pick a station ID!! Project data quality and integrity
+   depends on your cooperation.
  * The rule is: one station ID per receiver. Do not under any circumstances
    use the same ID on multiple receivers, even if you think it should be
-   fine. We have 2^64 IDs available, just ask for more IDs
+   fine. We have 2^64 IDs available, just ask for more IDs.
  * Even if you think it should be fine to reuse the same ID, for example
-   because your observer page on galmon.eu will look nicer, DO NOT DO IT. It
-   messes up our algorithms which track the clock of your receiver.
- * You can set --owner and --remark fields, which helps with administration.
+   because your observer page on galmon.eu will look nicer, DO NOT DO IT!
+   It messes up our algorithms which track the clock of your receiver.
+ * Please set the --owner and --remark fields - they help with administration.
    These fields will show up on https://galmon.eu/observers.html
- * Ublox8 based receivers support GPS/Galileo + BeiDou OR GLONASS. You can't
-   do all four at the same time. GPS and Galileo share a slot. If you want
-   to know if you should add BeiDou or GLONASS, you can either use your own
+ * Ublox8 based receivers support (GPS AND Galileo) + (BeiDou OR GLONASS). They can't
+   process all four systems at the same time. GPS and Galileo share a slot. BeiDou or GLONASS
+   share a second slot. See 
+   [here](https://www.geospatialworld.net/blogs/gnss-frequency-bands-for-constellations/)
+   for some more information.
+ * If you want to know if you should add BeiDou or GLONASS, you can either use your own
    preference or ask us what we are missing in your region.
 
 Downtime