PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-11:12:50
G01     120.4          16.8                2.6 +/-    1.81       6.2 +/-    1.81  0.050 / 0.080
G07     76.7           67.1                3.1 +/-    0.75       3.3 +/-    0.75  0.040 / 0.100
G08     44.9           30.8                3.0 +/-    1.53       5.1 +/-    1.53  0.030 / 0.040
G09     175.3          25.2                3.0 +/-    1.83       5.8 +/-    1.83  0.030 / 0.030
G11     107.0          39.3                3.4 +/-    0.78       5.0 +/-    0.78  0.040 / 0.050
G13     318.3          18.5                2.2 +/-    3.10       5.1 +/-    3.10  0.040 / 0.060
G17     200.6          24.5                3.8 +/-    1.29       7.5 +/-    1.29  0.080 / 0.170
G18     95.2           20.1                4.1 +/-    1.43       8.9 +/-    1.43  0.090 / 0.180
G28     289.3          56.6                3.4 +/-    0.72       4.0 +/-    0.72  0.030 / 0.040
G30     340.5          65.9                1.7 +/-    0.69       1.8 +/-    0.69  0.030 / 0.040