PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-11:27:50
G01     117.8          18.7                4.5 +/-    1.40      10.1 +/-    1.40  0.030 / 0.010
G07     84.4           65.7                5.5 +/-    0.57       5.9 +/-    0.57  0.030 / 0.020
G08     43.8           28.2                3.4 +/-    1.88       6.2 +/-    1.88  0.020 / 0.030
G09     175.0          22.3                5.2 +/-    1.72      10.9 +/-    1.72  0.030 / 0.040
G11     103.1          40.4                4.6 +/-    0.93       6.6 +/-    0.93  0.160 / 0.460
G13     316.9          20.8                2.6 +/-    2.39       5.6 +/-    2.39  0.180 / 0.270
G17     201.4          27.5                4.9 +/-    1.70       9.0 +/-    1.70  0.120 / 0.170
G18     92.1           21.3                4.8 +/-    1.60      10.3 +/-    1.60  0.130 / 0.130
G28     294.8          57.8                3.9 +/-    0.93       4.5 +/-    0.93  0.120 / 0.180
G30     345.3          68.6                4.3 +/-    0.75       4.6 +/-    0.75  0.130 / 0.250