From 3c3f6d7a86155527ffc7f7be747c0949b30291e4 Mon Sep 17 00:00:00 2001
From: Whitney Armstrong <warmstrong@anl.gov>
Date: Tue, 24 Aug 2021 10:58:15 -0500
Subject: [PATCH] 	modified:   README.md

---
 README.md | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 483c21d..653d880 100644
--- a/README.md
+++ b/README.md
@@ -137,7 +137,7 @@ The tracking surfaces can be viewed in a cad program using the output `tracking_
 
 <img src="tracking_geometry.png" width="600px"/>
 
-Assuming this is already done, we describe the data processing.
+Assuming the ACTS geometry is already constructed, we move on to describe the data processing.
 
 ##### Source Links and Measurements
 
@@ -163,12 +163,17 @@ A Kalman filter needs a starting point and those are the `Initial Track Paramete
 Conceptually the process of determining these parameters begins with track seeding.
 
 
-ACTS has a Combinatorial Kalman Filter (CKF) which does both track finding and fitting.  
+#### ACTS CKF 
+
+Currently the default is to use the Combinatorial Kalman Filter (CKF) which does both track finding and fitting.  
 
 
 ### GenFit2
 
 [GenFit](https://github.com/GenFit/GenFit) is a generic track fitting tool built on ROOT and the tgeo library.
+The geometry is constructed and geometry handles are present in the geometry service.
+
+We skip this for now.
 
 
 ## Adding a New Algorithm to Juggler
-- 
GitLab