Hello Ron/Stacey,
I am having difficulty identifying if Verb ing followed by a noun acts as a modifier or as a gerund  
I came across below mentioned sentences in Manhattan SC 
The sleeping cat took a nap - As per the guide , sleeping is a verb ing modifier. 
Tracking satellites accurately  is important for space agency  - In this case , Tracking satellites accurately is a simple gerund phrase 
I would appreciate it if you explain how to determine if verb ing before a noun is a modifier or  part of a  gerund phrase
							