The Advanced Range Instrumentation Aircraft (ARIA - pronounced Ah-RYE-ah) are EC-135E and EC-18B
aircraft used as flexible airborne telemetry data recording and relay stations. These aircraft were designed and
developed to supplement land and marine telemetry stations in support of DOD and NASA space and missile
programs. The ARIA have the capability to acquire, track, record, and retransmit telemetry signals, primarily in
the S-band (2200-2400 MHz) frequency range.