The Imagery Viewer is an application created by the Pennsylvania Spatial Data Access(PASDA)which allows users to locate, view and download PAMAP imagery, DOQQ's, DRG's, and NAIP imagery.
Once you have navigated to the area you want to download click on the Identify & Download Imagery button.
The download window will open and display all the avalible imagery for the location you chose. You will be able to choose from FTP or HTTP download and TIFF of MrSID formats where avalible.
There are various other ways to search the Imagery Viewer:
The user is provided with multiple image tiles to assist navigation.