Docs update

Author: nseidle

docs/correction_sources.md

@@ -4,12 +4,12 @@ Surveyor: ![Feature Supported](img/Icons/GreenDot.png) / Express: ![Feature Supp
 
 To achieve an RTK Fix, SparkFun RTK products must be provided with a correction source. This correction data, sometimes called RTCM (see [What is RTCM?](https://learn.sparkfun.com/tutorials/what-is-gps-rtk/all#what-is-rtcm)), can be produced from a variety of sources.
 
-**Note:** The RTK Facet L-Band is capable of receiving RTCM corrections from a terrestrial source but because it has a built-in L-Band receiver, we recommend using the satellite-based corrections.
-
 * [Paid Services](correction_sources.md#paid-services)
 * [Government Provided Corrections](correction_sources.md#government-provided-corrections)
 * [Permanent Base](correction_sources.md#permanent-base)
 
+**Note:** The RTK Facet L-Band is capable of receiving RTCM corrections from a terrestrial source but because it has a built-in L-Band receiver, we recommend using the satellite-based corrections.
+
 ## Paid Services
 
 These services cover entire countries and regions but charge a monthly fee. Easy to use, but the most expensive.
@@ -21,6 +21,8 @@ These services cover entire countries and regions but charge a monthly fee. Easy
 * [KeyNetGPS](https://www.keypre.com/KeynetGPS) ($375/month) North Eastern US
 * [Hexagon/Leica](https://hxgnsmartnet.com/en-US) ($500/month) - partial US, EU
 
+Using PointOneNav is discussed in the [Quick Start guide](https://docs.sparkfun.com/SparkFun_RTK_Firmware/intro/#ntrip-example). We'll discuss using Skylark below. All services have the same basic interface: as long as the service has NTRIP, the SparkFun RTK product can use it.
+
 **Skylark**
 
 ![Skylark coverage area](img/Corrections/Skylark-Coverage.png)
@@ -51,7 +53,6 @@ One downside is that with a 'regional' provider such as Skylark the distance to
 
 PointPerfect is a correction service run by u-blox. The service runs about $44 per month and covers the contiguous USA and Europe. Unfortunately, it does not have NTRIP access at the time of writing. Instead, they use an API and encrypted packets in a format called SPARTN. SparkFun uses the PointPerfect service to provide satellite-based corrections to the [RTK Facet L-Band](https://www.sparkfun.com/products/20000). This service works very well for the RTK Facet L-Band, but because no 3rd party GIS software is known to exist that can communicate with PointPerfect, we don't currently recommend using PointPerfect with SW Maps, Lefebure, Field Genius, SurvPC, Survey Master, etc.
 
-
 ## Government Provided Corrections
 
 ![Wisconsin network of CORS](<img/Corrections/SparkFun NTRIP 7 - Wisconsin Map.png>) 

docs/permanent_base.md

@@ -2,6 +2,10 @@
 
 Surveyor: ![Feature Supported](img/Icons/GreenDot.png) / Express: ![Feature Supported](img/Icons/GreenDot.png) / Express Plus: ![Feature Not Supported](img/Icons/RedDot.png) / Facet: ![Feature Partially Supported](img/Icons/YellowDot.png) / Facet L-Band: ![Feature Partially Supported](img/Icons/YellowDot.png) / Reference Station: ![Feature Supported](img/Icons/GreenDot.png)
 
+![SparkFun Base Station Enclosure](img/Corrections/Roof_Enclosure.jpg)
+
+*The base station at SparkFun*
+
 This section goes into depth on how to gather the data using an RTK product to create a permanent fixed base.
 
 **Note:** The RTK Facet and RTK Facet L-Band are rated IP53 - Protected from limited dust ingress and water spray. As such it is not recommended for permanent outdoor deployment. Use the RTK Surveyor or Express with a fully sealed [TOP106 antenna](https://www.sparkfun.com/products/21801).