The Transportable Array (TA) is a gridwork of broadband seismic instruments that have been, or are being installed across the continental United States (see a map of TA stations that have been installed to date). They are laid out in a rectangular array, about 75 kilometers between stations stretching from Canada to Mexico and from the Pacific Ocean eastward.
www.passcal.nmt.edu/taweb has documentation about TA station operations. Information about the steps in the creation and maintenance of a TA station are found here, including: Siting, Permitting, Construction (Vault design), Installation (electronic instrumentation information, procedures, and relevant software), Servicing (tools, procedures, and software), and Demobilization. This website is made up of linkable objects and clicking anywhere on any page will lead to another page. Clicking on an object will zoom into more detailed information about that object. Clicking off any object will return to the previous, more general page. Watch this 3-minute movie to learn how to get the information you're looking for on the TA Instrumentation website
Three-component, 40 samples-per-second data is broadcast onto the Internet by each active station. The Array Network Facility (ANF) at UCSD in San Diego receives the data from the TA seismic stations at near realtime and reports on the Array's realtime state of health. The ANF then transmits data to the IRIS Data Management Center for archiving as part of the USArray Transportable Array (EarthScope) network.
