PERSIANN-Unet (PUnet) rainfall product is available from 2000 (March) through current
and is a high-resolution (.04deg), with global coverage from 60N to 60S.

The final PUnet rainfall data are accumulated (in mm) for 
PUnet1hourly 
PUnet3hourly 
PUnet6hourly 
PUnetdaily 
PUnetmonthly
PUnetyearly

provided in separate directories under:
    http://persiann.eng.uci.edu/CHRSdata/PUnet/

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

PUnet*YYMMDDhh.bin.gz

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

YYMMDD  -- year month day

hh -- will be the starting hour of the accumulation period. For example:
    PUnet3h25050606.bin.gz
represents the mm accumulation over the 3 hour period on 2025 May 5th
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.

Except for 1hourly all data are in flat binary files 4-byte float ('float32' in MATLAB) values.
1-hourly data are 2-byte short int (or 'int16' in MATLAB) and scaled by 100. Divide by 100 to
get mm/hr. Data 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 

---
May 06, 2025
Phu Nguyen (ndphu@uci.edu)