Instrument Layout

Schematic of EDOP within the nose of ER-2

There are two fixed-beam antennas: nadir and 33° forward of nadir
Data System provides real-time control of radar transmitter
Signal tranimission, reception and processing

Real-time, digital IF, processing to provide reflectivity and pulse pair velocity estimates.

738 range gates; 12bit digitization
37.5 meter gate spacing
data storage 125 kbytes/s; 3gbyte/flight
periodic internal calibrations during flight
at pulse repitition frequency=4.4 khz, nyquist velocity=34 m/s; maximum range=34 km

NCAR's VIRAQ and quad digital receiver hardware provides matched filtering, amplitude, and in-phase/ quadrature measurements