TY - GEN
AU - Qifeng Lu
AU - W. Bell
AU - Peter Bauer
AU - Niels Bormann
AU - C. Peubey
AU - Alan Geer
AB - The FY-3A MWTS suffers from radiometer non-linearities and uncertainties in passband centre frequencies. Corrections have been developed, and are assessed here by comparing re-calibrated MWTS data with equivalent AMSU-A observations. The corrections are effective in improving the first guess departure statistics for MWTS, relative to the original un-corrected data, to values close to those for AMSU-A equivalent channels. In observing system experiments MWTS observations improve the first guess fits for AMSU-A observations. Forecast verification shows a systematic improvement by using the re-calibrated data, for example forecasts of 200 hPa geopotential are improved to Day 4 in the SH by approximately 1%.
BT - ECMWF Technical Memoranda
DA - 02/2011
DO - 10.21957/4grqj1vwq
LA - eng
M1 - 642
N2 - The FY-3A MWTS suffers from radiometer non-linearities and uncertainties in passband centre frequencies. Corrections have been developed, and are assessed here by comparing re-calibrated MWTS data with equivalent AMSU-A observations. The corrections are effective in improving the first guess departure statistics for MWTS, relative to the original un-corrected data, to values close to those for AMSU-A equivalent channels. In observing system experiments MWTS observations improve the first guess fits for AMSU-A observations. Forecast verification shows a systematic improvement by using the re-calibrated data, for example forecasts of 200 hPa geopotential are improved to Day 4 in the SH by approximately 1%.
PB - ECMWF
PY - 2011
EP - 13
T2 - ECMWF Technical Memoranda
TI - Improved assimilation of data from China's FY-3A Microwave Temperature Sounder (MWTS)
UR - https://www.ecmwf.int/node/10850
ER -