PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-14:27:30
G01     85.9           32.4                7.7 +/-    0.77      12.9 +/-    0.77  0.030 / 0.020
G07     128.6          39.3               10.7 +/-    1.59      15.8 +/-    1.59  0.020 / 0.030
G11     63.3           35.7                9.9 +/-    0.70      15.5 +/-    0.70  0.040 / 0.050
G13     292.8          35.7               11.3 +/-    1.76      17.7 +/-    1.76  0.040 / 0.060
G17     217.0          59.6                9.6 +/-    0.88      10.9 +/-    0.88  0.080 / 0.110
G19     216.1          32.0               10.2 +/-    1.68      17.2 +/-    1.68  0.070 / 0.110
G28     355.9          61.3                8.5 +/-    0.83       9.5 +/-    0.83  0.090 / 0.100
G30     109.0          75.7                9.8 +/-    0.94      10.1 +/-    0.94  0.090 / 0.090