PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-13:43:00
G01     86.0           32.4                7.5 +/-    1.22      12.5 +/-    1.22  0.050 / 0.050
G07     128.6          39.6               10.1 +/-    1.37      14.8 +/-    1.37  0.040 / 0.050
G11     63.5           35.9                9.2 +/-    1.02      14.4 +/-    1.02  0.070 / 0.100
G13     292.9          35.6                8.7 +/-    2.42      13.6 +/-    2.42  0.080 / 0.090
G17     217.0          59.6                9.3 +/-    0.76      10.6 +/-    0.76  0.020 / 0.050
G19     216.1          32.0                9.6 +/-    2.23      16.2 +/-    2.23  0.020 / 0.020
G28     356.0          61.3                8.1 +/-    0.93       9.1 +/-    0.93  0.050 / 0.040
G30     109.3          75.5                9.1 +/-    1.00       9.4 +/-    1.00  0.060 / 0.040