PERSIANN-CCS-CDR rainfall product is available from 1983-2020 (current) and is a high-resolution (.04deg),
sub-daily data set with global coverage from 60N to 60S.

The product is generated from the PERSIANN-CCS data algorithm using global IR input
data at .04 deg resolution and the resulting data are bias-corrected using monthly GPCP
v2.3

The IR data from 1983 - 2000 (January & February only) are generated from the GridSat-B1 data set
available at NCDC/NCEI
https://www.ncdc.noaa.gov/cdr/fundamental/geostationary-ir-channel-brightness-temperature-gridsat-b1

The remaining data from 2000 (march-dec) - 2020 (current) are generated from the CPC/NCEP data set
    ftp://ftp.cpc.ncep.noaa.gov/precip/global_full_res_IR/

The final PERSIANN-CCS-CDR rainfall data are accumulated (in mm) for
3hrly, 6hrly, daily, monthly, & yearly, provided in separate directories.

The files are named for the accumulation period and the
start time of the period.

PCCSCDRXXYYMMDDhh.bin.gz

XX -- will be 3h, 6h,1d, 1m, 1y

YYMMDD  -- year month day
YYMM for 1m data 
YYYY for 1y data 

hh -- will be the starting hour of the accumulation period. For example:
    PCCSCDR3h19010106.bin.gz
represents the mm accumulation over the 3 hour period on 2019 Jan 1st
from  06:00Z up through 08:59Z.

daily (1d) data do not have hh in the name and go from 00:00Z to 23:59Z of the given date.
monthly (1m) data are standardized to a 30day month.
yearly (1y) data are based on the accumulation for that calendar year.

All data are in flat binary files 4-byte float (float32) values in little-endian byte-order.

Area covered in .04 deg from 60N to 60S and 0 to 360 for
3000 rows x 9000 cols

Data are stored in the file in row-major orientation with the first 9000
values the N-most row centered at 59.98N  with longitude centers from
.02 to 359.98
and the last row (S-most row) centered at 59.98S 

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September 11, 2020