PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-12:57:50
G02     202.3          20.5                5.2 +/-    2.49      11.3 +/-    2.49  0.080 / 0.270
G06     167.3          58.8                5.7 +/-    0.99       6.6 +/-    0.99  0.080 / 0.270
G12     302.5          10.6               -6.5 +/-   13.46     -17.9 +/-   13.46  0.080 / 0.100
G13     224.3          10.7                4.0 +/-    2.44      11.0 +/-    2.44  0.090 / 0.090
G17     27.7           55.7                3.5 +/-    0.36       4.1 +/-    0.36  0.110 / 0.430
G19     319.0          69.7                4.3 +/-    0.39       4.6 +/-    0.39  0.120 / 0.320
G24     305.7          34.2                3.9 +/-    1.22       6.3 +/-    1.22  0.050 / 0.040
G28     91.3           38.4                5.0 +/-    0.56       7.4 +/-    0.56  0.040 / 0.040
G30     158.1          12.7                4.9 +/-    2.61      13.0 +/-    2.61  0.170 / 0.510