Not exact matches
* In February, 2006 NCDC transitioned to the use of an
improved Global Land and Ocean data set (Smith and Reynolds analysis (2005)-RRB- which incorporates new algorithms that better account for factors such as changes in
spatial coverage and evolving observing methods.
Finally, better
spatial / temporal
coverage is a main prerequisite for
improving current knowledge of global rainfall over the complete diurnal cycle.
VIIRS will also dramatically
improve on MODIS and SeaWiFS
spatial resolution (via a patented OLS - like17 detector aggregation technique) and global
coverage (via a 40 percent wider imaging swath), while offering comparable absolute radiometry and sensitivity as well as the long - term stability required by the IORD to support CDRs.
Prior to 1988, the satellite data that Trenberth uses is not available, but it is known that long term records in radiosondes contain large inhomogeneities due to
improving observing systems, increasing
spatial resolution (but still very little ocean
coverage), and the NCEP data in particular contains large model biases.