PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-21:27:50
G01     119.1          17.4               14.7 +/-    1.61      34.6 +/-    1.61  0.040 / 0.060
G07     87.2           62.7               13.5 +/-    0.71      15.0 +/-    0.71  0.040 / 0.060
G08     44.5           30.2                8.7 +/-    1.11      15.2 +/-    1.11  0.120 / 0.340
G09     177.3          27.2               15.1 +/-    1.42      28.2 +/-    1.42  0.130 / 0.480
G11     105.2          40.3               14.0 +/-    1.17      20.3 +/-    1.17  0.040 / 0.040
G13     317.6          19.8               14.1 +/-    2.12      31.2 +/-    2.12  0.040 / 0.040
G17     200.5          25.6               14.0 +/-    1.76      27.0 +/-    1.76  0.110 / 0.240
G18     91.3           20.4               12.9 +/-    0.93      28.1 +/-    0.93  0.090 / 0.210
G28     286.4          54.8               12.4 +/-    0.82      14.8 +/-    0.82  0.040 / 0.040
G30     346.4          68.7                8.7 +/-    0.82       9.3 +/-    0.82  0.040 / 0.040