PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-12:27:50
G02     201.6          16.5                4.3 +/-    1.75      10.4 +/-    1.75  0.090 / 0.170
G06     169.7          53.9                5.3 +/-    1.56       6.4 +/-    1.56  0.100 / 0.170
G13     227.4          13.6                4.3 +/-    1.70      11.1 +/-    1.70  0.080 / 0.100
G17     23.3           59.1                3.9 +/-    0.39       4.5 +/-    0.39  0.090 / 0.100
G19     305.5          69.8                3.9 +/-    0.97       4.2 +/-    0.97  0.160 / 0.480
G24     308.9          31.4                3.6 +/-    0.93       6.1 +/-    0.93  0.180 / 0.500
G28     86.4           40.9                4.0 +/-    0.56       5.8 +/-    0.56  0.040 / 0.040
G30     157.6          16.7                4.3 +/-    2.68      10.2 +/-    2.68  0.040 / 0.040