Daily report from Sipora (December 21, 2011)

Dear all,

Good morning..

This is daily report from Sipora on December 21, 2011.

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 UTC                                   00                      03                        06                        09                       12                    15                    18                    21

Observ. Members           Iyan, Jeni        Hmd, Riris         Hmd, Riris         Hmd, Riris        Hmd, Riris      Wu, Su           Wu, Su           Wu, Su

Sonde released (LT)       06:30                 09:30                  12:30                   15:30                   18:30               21:30                00:29              03:30

Observ. End time (LT)    07:40                10:52                   13:52                   16:35                   19:12               22:37                01:27              04:26       
                                                                                                    

Flight Direction                SE                     SE                     Over head           NE                       E                      NE                    NE                  NE                         

Max. elevation (km)         21.272             19.802                 23.786                 19.911                 15.230              20.570            17.576            16.841

Weather condition         very cloudy    slight rain         cloudy                cloudy                overcast          Clear              Clear               Clear                
loud amount                     7/8                   overcast              6/8                      8/8                        8/8                 3/8 (Ci)          3/8 (Ci)            3/8 (Ci) 
                                                                    (As, Sc)         Ac, As, Cu)          (As, Ac, Au)      (As, Ac, Cs)         

                               

Pressure (hPa)                  1006.6             1008.8               1007.3                  1005.3                 1006.3              1008.5            1007.5              1005.3          

Temperature (^oC)              25.3                 26.9                   30.8                      28.9                    26.4                  25.4                   25.1                 24.5

Relative humidity (%)      81                    76                      64                          73                      82                     88                      89                    89

Surf. Wind dir. (deg)        292                  298                    313                        258                    210                   167                    204                  156

Surf. Wind Speed (m/s)   0.2                   0.6                      0.6                         1.0                     0.0                    0.0                     0.6                   0.0

                    

Comments:

00 UTC  > 12.8 – 14.5 km, wind EDT were lose.

03 UTC  > Ascent rate:  238.8 m/minute  (slow).

06 UTC >  Ascent rate: 287.3 m/minute

09 UTC >  Ascent rate: 303.4 m/ minute; above 5 km height, zonal wind was easterly.

12 UTC >  # String didn't extended when we released balloon,

                    # RH fluctuation large

                    # wind calculation frequently difficult.

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Best regards,

susi