1. FTIPP FCLIM / TRMM / IRP Precipitation Pentads
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(A bit of Acronym Forensics)

2. FCLIM
FEWS Net Climatology
Famine Early Warning Systems Network

3. TRMM Tropical Rainfall Measuring Mission 3B42 V6, RT
The combined instrument rain calibration algorithm (3B-42) uses an optimal combination of 2B-31, 2A-12, SSMI, AMSR and AMSU precipitation estimates (referred to as HQ), to adjust IR estimates from geostationary IR observations. Near-global estimates are made by calibrating the IR brightness temperatures to the HQ estimates. The 3B-42 estimates are scaled to match the monthly rain gauge analyses used in 3B-43.
0.25 Deg 3-hourly 50N - 50S today

4. IR CPC IR Brightness Temperatures 4km 1/2-hourly 60N - 60S 2000-today
The Climate Prediction Center/NCEP/NWS is now making available globally-merged (60N-60S) pixel-resolution IR brightness temperature data (equivalent blackbody temps), merged from all available geostationary satellites (GOES-8/10, METEOSAT-7/5 & GMS). The availability of data from METEOSAT-5, which is located at 63E at the present time, yields a unique opportunity for total global (60N-60S) coverage.
4km 1/2-hourly 60N - 60S today

5. IRP - IR derived Precipitation
Basic idea,
IR ~ Temperature
Cold ~ Clouds
Clouds ~ Precip
So,
 IR ~  Precip

6. IRP in the W. Hemisphere For each 1/4 degree pixel and pentad (1-72)
for given month ( )
for given threshold ( K)
regress (TRMM daily rain rate) onto (%IR below TH)
Find the TH with the best correlation,
that becomes your model for that point
Apply this to .05 degree IR data to get .05 deg IRP

7. FTIPP Calculations FTIPP = FCLIM * (%TRMM + %IRP)/2
%TRMM = (TRMM.data + ) / (TRMM.clim + )
%IRP = (IRP.data + ) / (IRP.clim + )

17. Other things… Converting monthly FCLIM to pentads
How to use TRMM-RT before V6 available
How to validate
De-artifacting
From development to operational
Improve FTIPP using station data
FTIPP on other continents
Get into EWX