PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-13:42:50
G01     57.9           29.7                7.1 +/-    0.90      12.5 +/-    0.90  0.040 / 0.050
G07     143.2          20.2                8.1 +/-    0.99      17.8 +/-    0.99  0.030 / 0.040
G11     46.8           20.9                5.4 +/-    2.67      11.6 +/-    2.67  0.040 / 0.060
G13     259.6          34.6                6.1 +/-    2.03       9.7 +/-    2.03  0.040 / 0.060
G15     295.2          15.0                3.5 +/-    2.39       8.7 +/-    2.39  0.060 / 0.120
G17     273.8          78.8                7.1 +/-    0.64       7.2 +/-    0.64  0.050 / 0.120
G18     40.7           11.0                6.6 +/-    1.21      17.9 +/-    1.21  0.050 / 0.140
G19     234.0          48.9                7.7 +/-    0.84       9.9 +/-    0.84  0.060 / 0.160
G28     38.9           56.1                6.2 +/-    0.53       7.3 +/-    0.53  0.130 / 0.430
G30     145.6          51.8                8.3 +/-    1.19      10.2 +/-    1.19  0.150 / 0.550