PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-16:57:40
G01     268.6          40.6                9.6 +/-    1.51      13.8 +/-    1.51  0.130 / 0.210
G03     316.4          34.1                6.3 +/-    0.95      10.1 +/-    0.95  0.100 / 0.220
G10     130.7          15.9               10.4 +/-    1.52      25.2 +/-    1.52  0.030 / 0.030
G11     251.9          19.7                8.8 +/-    1.31      19.5 +/-    1.31  0.030 / 0.030
G14     43.7           50.2                7.4 +/-    0.68       9.3 +/-    0.68  0.060 / 0.080
G22     313.8          55.0                5.7 +/-    0.97       6.7 +/-    0.97  0.050 / 0.060
G25     51.4           16.7                6.7 +/-    0.82      15.9 +/-    0.82  0.060 / 0.070
G26     146.3          26.7               13.5 +/-    1.37      25.3 +/-    1.37  0.050 / 0.070
G31     51.3           71.6                8.9 +/-    0.71       9.3 +/-    0.71  0.090 / 0.140
G32     66.1           30.8                8.5 +/-    0.72      14.7 +/-    0.72  0.130 / 0.150