PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-13:42:50
G01     83.7           32.7                5.0 +/-    0.35       8.3 +/-    0.35  0.040 / 0.100
G07     130.0          37.9                7.3 +/-    0.76      11.0 +/-    0.76  0.050 / 0.120
G11     61.6           34.9                3.8 +/-    0.67       6.1 +/-    0.67  0.030 / 0.030
G13     290.6          36.1                6.9 +/-    0.79      10.7 +/-    0.79  0.030 / 0.030
G15     313.6          10.8               -2.9 +/-   16.89      -7.9 +/-   16.89  0.050 / 0.070
G17     218.8          61.5                8.8 +/-    0.62       9.9 +/-    0.62  0.040 / 0.080
G19     217.1          33.8                7.9 +/-    0.67      12.8 +/-    0.67  0.040 / 0.050
G28     359.7          61.1                5.6 +/-    0.60       6.3 +/-    0.60  0.040 / 0.040
G30     114.9          74.0                7.2 +/-    0.92       7.4 +/-    0.92  0.090 / 0.110