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2.ESTIMATION – Microwave data International constellation of microwave sensors is uncoordinated
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Transcript of 2.ESTIMATION – Microwave data International constellation of microwave sensors is uncoordinated
2.ESTIMATION – Microwave data
Internationalconstellation ofmicrowave sensors isuncoordinated• Old satellites drift• But still useful!
HRPP’s use “all” sensors
• Timing of version changes for both input and HRPP algorithms
• Sensor degradation
CDR-like GPCP• Limit microwave
calibrator to 6 a.m./ p.m. satellite
• Consistent diurnal bias
2.ESTIMATION – Microwave data
Internationalconstellation ofmicrowave sensors isuncoordinated• Old satellites drift• But still useful!
HRPP’s use “all” sensors
• Timing of version changes for both input and HRPP algorithms
• Sensor degradation
CDR-like GPCP• Limit microwave
calibrator to 6 a.m./ p.m. satellite
• Consistent diurnal bias
2.ESTIMATION – Microwave data
Internationalconstellation ofmicrowave sensors isuncoordinated• Old satellites drift• But still useful!
HRPP’s use “all” sensors
• Timing of version changes for both input and HRPP algorithms
• Sensor degradation
CDR-like GPCP• Limit microwave
calibrator to 6 a.m./ p.m. satellite
• Consistent diurnal bias
3. CURRENT ISSUES – Combination errors
Need to estimate bias outside usual validation areas• Very resistant to solution
Need to estimate HRPP random error• Depends on weather regimes• Time/space covariance structure
• real• retrieval
Account for diverse interleaved sources• Graphic looks
better than the real situation
orange = best microwave ± 1 hr
green = other microwave ± 1 hr
3. CURRENT ISSUES – Combination errors
Need to estimate bias outside usual validation areas• Very resistant to solution
Need to estimate HRPP random error• Depends on weather regimes• Time/space covariance structure
• real• retrieval
Account for diverse interleaved sources• Graphic looks
better than the real situation
orange = best microwave ± 1 hr
green = other microwave ± 1 hr
3. CURRENT ISSUES – Combination errors
Need to estimate bias outside usual validation areas• Very resistant to solution
Need to estimate HRPP random error• Depends on weather regimes• Time/space covariance structure
• real• retrieval
Account for diverse interleaved sources• Graphic looks
better than the real situation
orange = best microwave ± 1 hr
green = other microwave ± 1 hr