Grid Resolution: 0.25 degrees lat/lon
Domain: Global (60N - 60S)
Temporal Resolution 3 hours

3B42 Version 6 (Merger of HQ,VAR & rain gauge information)

This algorithm provides a combination of the TRMM merged passive microwave (HQ) and microwave-calibrated IR (VAR). The current scheme is simple replacement - for each gridbox the HQ value is used if available, and otherwise the VAR value is used. Then in each grid box all of the multi-satellite values in the month are summed and combined with monthly gauge data to produce the Version 6 TRMM Plus Other Data (3B43) product. Finally, for each grid box all the 3-hourly values are scaled to approximately sum to the 3B43 monthly value.

REFERENCES

Huffman, G.J., R.F. Adler, S. Curtis, D.T. Bolvin, and E.J. Nelkin, 2005: Global Rainfall Analyses at Monthly and 3-Hr Time Scales. Chapter 4 of Measuring Precipitation from Space: EURAINSAT and the Future, V. Levizzani, P. Bauer, and J. Turk, Ed., Springer Verlag (Kluwer Academic Pub. B.V.), Dordrecht, The Netherlands, accepted. [Invited paper]

Huffman, G.J., R.F. Adler, E.F. Stocker, D.T. Bolvin, and E.J. Nelkin, 2003: Analysis of TRMM 3-Hourly Multi-Satellite Precipitation Estimates Computed in Both Real and Post-Real Time. Combined Preprints CD-ROM, 83rd AMS Annual Meeting, Poster P4.11 in: 12th Conf. on Sat. Meteor. and Oceanog., 9-13 February 2003, Long Beach, CA, 6 pp.