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NASA ER-2 Doppler radar reflectivity calibration for the CAMEX projectThe NASA ER-2 Doppler radar (EDOP) was flown aboard the ER-2 high-altitude aircraft in September and October 1993 for the Convection and Moisture Experiment. During these flights, the first reliable reflectivity observations were performed with the EDOP instrument. This report details the procedure used to convert real-time engineering data into calibrated radar reflectivity. Application of the calibration results produces good agreement between the EDOP nadir pointing reflectivity and ground truth provided by a National Weather Service WSR-88D radar. The rms deviation between WSR-88D and EDOP is 6.9 dB, while measurements of the ocean surface backscatter coefficient are less than 3 dB from reported scatterometer coefficients. After an initial 30-minute period required for the instrument to reach thermal equilibrium, the radar is stable to better than 0.25 dB during flight. The range performance of EDOP shows excellent agreement with aircraft altimeter and meteorological sounding data.
Document ID
19940033279
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Caylor, I. J.
(Science Systems and Applications, Inc. Lanham, MD., United States)
Heymsfield, G. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bidwell, S. W.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ameen, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1994
Subject Category
Meteorology And Climatology
Report/Patent Number
NAS 1.15:104611
NASA-TM-104611
REPT-94B00110
Accession Number
94N37790
Funding Number(s)
PROJECT: RTOP 460-28-16
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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