More detailed information about the ER-2 Doppler Radar may be found at the EDOP Home Page. Additional details of the radar and processing are described by Heymsfield et al. Minimum detectable reflectivity is about -10 dBZ at an altitude of 15 km with a 0.375 meters range gate spacing. The transmit pulse is 0.5 second and the gate spacing is over sampled at 37.5 meter interval. The ER-2 ground speed is nominally 210 m/s and the integration period used by the data system is 0.5 second. The beam width of the antenna is 3 degrees in the vertical and horizontal directions which, for a 20 km altitude, yields a nadir footprint at the surface of 1 km. The instrument has two fixed antennas, one pointing at nadir and the second pointing approximately 33 degree ahead of nadir. The ER-2 Doppler radar (EDOP) is an X-band (9.6 GHz) Doppler radar mounted in the nose of ER-2.
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