bTPW (blended Total Precipitable Water) products naming conventions:

Within ftp satepsanone site,

under .../BLTPW/data/HDFEOS/ 

NPR.COMP.PCT.Syyjjjhhmm.Eyyjjjhhmm.Thhmmss.he4.gz (percentage of TPW normal, or TPW anomaly - zipped hdf4 format)
NPR.COMP.TPW.Syyjjjhhmm.Eyyjjjhhmm.Thhmmss.he4.gz (blended Total Precipitable Water - zipped hdf4 format)

The above files represent the hdf4 data file for either the TPW anomaly or blended Total Precipitable Water.
These above file formats demonstrate the start and end time in year, julian day, hour, and minutes for which the data file 
covers and also the time for which the data file was generated in hour, minutes, and seconds.

under .../BLTPW/SOS/

tpw.2048x4096.Dyyjjj.Shhmm.Ehhmm.jjjhhmm.jpg (blended TPW global image - jpeg 2048x4096 pixel format )

The above jpeg image represents the global perspective for blended TPW. 
The image displays the year and julian day of the data covered, the start and end time in hour and minutes for which the 
data of the image covers, and the creation time of the image in julian day, hour, and minutes.

yy = year 
jjj = julian day
hh = hour
mm = minutes
ss = seconds

D= day
S= start
E = end
T = time

Note: These products are in UTC time along with the "Date Modified" section on this ftp site.

Inside these hdf files, you will find variables showing HDFEOS time including the "Time_Mean_TPW_PENTAD" variable. 
Each time variable represents the number of seconds since 0000 UTC on January 1, 1993.

The btpw products use a Mercator projection with a 16-km resolution at the equator. The map is centered at 
the equator and 160 degrees West. It has 1437 rows and 2500 columns, which covers the earth from about 71 degrees North
to 71 degrees South. The cut line is at 20 degrees East, which was chosen to emphasize ocean areas.  
The product output are shown as gridded data files, so the lat and lon are not included. 
Please refer to A_BTW_Latitude.txt and A_BTW_Longitude.txt for the lat and lon values of each pixel.  

For more details about the above files and what they contain, please visit 
the OSPO bTPW homepage http://www.ospo.noaa.gov/Products/bTPW/index.html. By clicking on the side links,
you can find various kinds of information about the bTPW product and what it represents.