The observation data was stored line by line in the following format:
yyyy;mm;dd;hh;mm;ss;<SPECTRUM>;...;</SPECTRUM>, 
where yyyy is year, mm is month, dd is day, hh is hour, mm is miniute, and ss is second. 
The sampling interval is 10 seconds.
The precipitation particle spectrum data is between <SPECTRUM> and </SPECTRUM> delimited by semicolon, including 32*32=1024 channels data altogether. 
They are the number of particles in the first diameter channel of the first velocity channel, the number of particles in the second diameter channel of the first velocity channel, ..., 
the number of particles in the 32nd diameter channel of the first velocity channel, the number of particles in the first diameter channel of the second velocity channel, ..., 
the number of particles in the 32nd diameter channel of the second velocity channel, ...,and the number of particles in the 32nd diameter channel of the 32nd velocity channel.