Philadelphia, PA Coast Guard Station - AJ2129
Updated: Feb 6
If you follow this monument blog then you know there are frustratingly few good horizontal & vertical controls within Philadelphia (you are also a nerd - welcome!). This one is is pretty good and comes with the bonus of getting to hang out with the US Coast Guard and see their cool boats up close. It also comes with some pesky government access restraints. You will want to email David.E.Pilitowski@uscg.mil well ahead of time and let him know you would like an appointment.
View Toward New Jersey (note there is more than one monument here - choose wisely!)
The Alpha RTK network consistently tests better than 1 centimeter horizontal and 2 cm vertical at this station.
AJ2129 can be easily navigated to by using Alpha RTK's publicly accessible ESRI map.