PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/27-20:27:50
G01     118.5          17.8               15.4 +/-    1.17      35.7 +/-    1.17  0.040 / 0.030
G07     89.2           61.9               14.1 +/-    1.09      15.8 +/-    1.09  0.040 / 0.040
G08     44.4           30.0               10.4 +/-    1.57      18.2 +/-    1.57  0.260 / 0.370
G09     177.4          26.8               15.4 +/-    1.55      28.9 +/-    1.55  0.130 / 0.400
G11     104.5          40.5               14.0 +/-    0.77      20.1 +/-    0.77  0.080 / 0.100
G13     317.3          20.3               10.7 +/-    1.80      23.5 +/-    1.80  0.100 / 0.080
G17     200.8          25.9               16.9 +/-    1.68      32.4 +/-    1.68  0.100 / 0.130
G18     91.1           20.7               13.4 +/-    1.12      29.1 +/-    1.12  0.100 / 0.150
G28     287.1          54.9               12.7 +/-    1.93      15.1 +/-    1.93  0.040 / 0.040
G30     348.6          69.5               13.3 +/-    0.58      14.1 +/-    0.58  0.040 / 0.030