Docs update

Author: nseidle

README.md

@@ -9,12 +9,15 @@ The RTK Torch is the latest and greatest generation RTK product from SparkFun El
 
 This repo houses the datasheets and technical information for the specific hardware devices inside RTK Torch. For the firmware, see [RTK Everywhere Firmware](https://github.com/sparkfun/SparkFun_RTK_Everywhere_Firmware). This repo also houses the Hookup Guide material.
 
+[![RTK Torch Antenna Reference Point](RTK-Torch-ARP-Small.jpg)](RTK-Torch-ARP.jpg)
+
+*RTK Torch Antenna Reference Point*
 
 Repository Contents
 -------------------
 
-* **[/docs](/docs/)** - Online documentation files
-* **[Datasheets](/Datasheets) - Datasheets for the various bits of hardward in the RTK Torch
+* **[/docs](/docs/)** - Markdown files used in the [hookup guide](https://docs.sparkfun.com/SparkFun_RTK_Torch/)
+* **[Datasheets](/Datasheets)** - Datasheets for the various bits of hardware in the RTK Torch
 
 Product Variants
 ----------------

RTK-Torch-ARP-Small.jpg

@@ -4,7 +4,9 @@ This is an overview of the RTK Torch hardware including the parts included with
 
 ## GNSS Receiver Specifications
 
-![alt text](GPS-24672-Action-4.jpg)
+![RTK Torch on a Monopod + Bipod](GPS-24672-Action-4.jpg)
+
+*RTK Torch on a Monopod + Bipod*
 
 The RTK Torch from SparkFun Electronics uses the UM980 high precision RTK capable GNSS receiver from Unicore ([datasheet](../Datasheets/UM980_Datasheet.pdf)). The receiver is capable of achieving the following accuracies:
 
@@ -33,6 +35,14 @@ The UM980 is capable of receiving the following GNSS frequencies:
 
 The RTK Torch utilizes a specially tuned multi-frequency helical antenna making the overall device smaller and more lightweight than competing units. 
 
+## Antenna Reference Point
+
+[![SparkFun RTK Torch ARP](RTK-Torch-ARP-Small.jpg)](RTK-Torch-ARP.jpg)
+
+*SparkFun RTK Torch Antenna Reference Point*
+
+The ARP for the RTK Torch is **115mm** to L1 and **118mm** to L2/L5 reception.
+
 ## Power / USB
 
 The human interface to the RTK Torch is simplistic by design! There is only one button, one USB port, and three LEDs.