Adwords coordinate format used for radius targeting

Question:
Does anyone know what is the coordinate format used for radius targeting is?  I'm looking at helping a client that provides aviation products and I'd like to be able to target locations based on the aviation coordinates they can provide me.  I've found that Latitude and Longitude Formats can use the following styles of format and I suspect Google uses the last one.  

• Degrees-Minutes-Seconds
• Degrees-Decimal Minutes
• Decimal Degrees

Answer:
I looked up the Google maps accepted formats:

"Search for a place using latitude and longitude coordinates
Open Google Maps.

Type your coordinates into the search box. Here are examples of accepted formats:

Degrees, minutes, and seconds (DMS): 41°24'12.2"N 2°10'26.5"E
Degrees and decimal minutes (DMM): 41 24.2028, 2 10.4418
Decimal degrees (DD): 41.40338, 2.17403"

What I also found if you are in Google maps satellite view and click on a spot it will give you the coordinates. Google never ceases to impress. 

Google also allows targeting by airports. Which may be of an interest to your client.