Quality-controlled and Cubic Spline interpolated rain rates from IFloodS
NASA gauges. The rain rates are generated using the algorithm of 
Wang et al. 2008 (JTECH).

(Wang, J., B. L. Fisher, and D. B. Wolff, 2008: Estimating rain rates from 
tipping-bucket rain gauge measurements. J. Atmos. Oceanic Technol., 25, 43-56.)

Each yearly file contains all rain rates from each gauge. Only non-zero rain
rates are provided. The data unit is mm/hr, and the resolution is 1 minute.

File Name:  ifloods_raingauge_NASA00#_A_20130911_20131229_gmin.txt
where ## is NASA APU number (2,4,5,..,12), and YYYY is year (2013), month (09), day (11),
gmin is a one minute interpolated rain rate.

The header of each file gives data year, gauge identification number,
gauge type and its bucket resolution, as well as data column labels.

Each data line gives the year, month, day of the month, Julian day of  
the year, hour, minute, interpolated one-minute rain rate (mm/hr), 
latitude and longitude.

e.g., ifloods_raingauge_NASA0008_A_20130911_20131229_gag.txt

2013 IFloodS APU08 MetOne 0.254 mm
Year Mon Day Jday  Hr Min Rain[mm/h]  Lat        Lon
2013  04  06  096  22  34    3.05  41.99268  -92.07085
2013  04  06  096  22  35    3.05  41.99268  -92.07085
2013  04  06  096  22  36    3.05  41.99268  -92.07085
2013  04  06  096  22  37    3.05  41.99268  -92.07085
2013  04  06  096  22  38    3.05  41.99268  -92.07085
2013  04  08  098  06  35    3.05  41.99268  -92.07085
2013  04  08  098  06  36    3.05  41.99268  -92.07085
2013  04  08  098  06  37    3.05  41.99268  -92.07085
2013  04  08  098  06  38    3.05  41.99268  -92.07085
2013  04  08  098  06  39    3.05  41.99268  -92.07085
2013  04  08  098  07  27    4.84  41.99268  -92.07085
2013  04  08  098  07  28    4.13  41.99268  -92.07085
2013  04  08  098  07  29    4.13  41.99268  -92.07085
2013  04  08  098  07  30    4.84  41.99268  -92.07085
2013  04  08  098  07  31    6.27  41.99268  -92.07085
2013  04  08  098  07  32    7.85  41.99268  -92.07085
2013  04  08  098  07  33    7.39  41.99268  -92.07085
2013  04  08  098  07  34    5.86  41.99268  -92.07085
2013  04  08  098  07  35    9.38  41.99268  -92.07085
2013  04  08  098  07  36   15.24  41.99268  -92.07085
2013  04  08  098  07  37   10.09  41.99268  -92.07085
2013  04  08  098  07  38    4.08  41.99268  -92.07085
......................................................