PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-12:27:50
G01     114.6          20.9                4.1 +/-    1.17       8.9 +/-    1.17  0.140 / 0.160
G07     94.7           61.2                4.2 +/-    0.78       4.7 +/-    0.78  0.130 / 0.150
G08     43.0           25.5                4.1 +/-    2.10       7.8 +/-    2.10  0.040 / 0.030
G09     174.3          18.9                2.8 +/-    1.11       6.2 +/-    1.11  0.050 / 0.030
G11     97.7           39.9                3.9 +/-    0.67       5.8 +/-    0.67  0.030 / 0.030
G13     316.4          21.2                3.0 +/-    2.32       6.3 +/-    2.32  0.030 / 0.030
G17     202.3          31.9                5.5 +/-    0.95       9.2 +/-    0.95  0.080 / 0.090
G28     302.3          59.0                2.1 +/-    1.14       2.4 +/-    1.14  0.100 / 0.090
G30     351.6          70.9                3.6 +/-    0.68       3.7 +/-    0.68  0.120 / 0.190