PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-22:58:10
G01     41.4           16.9                9.6 +/-    2.14      22.8 +/-    2.14  0.190 / 0.340
G06     177.8          34.5               13.8 +/-    1.84      22.1 +/-    1.84  0.180 / 0.180
G13     237.8          23.2               13.1 +/-    2.33      26.8 +/-    2.33  0.040 / 0.050
G15     271.2          12.7                9.6 +/-    1.64      25.3 +/-    1.64  0.050 / 0.050
G17     2.9            70.7               10.5 +/-    0.41      11.1 +/-    0.41  0.040 / 0.030
G19     272.9          68.5               10.8 +/-    0.57      11.5 +/-    0.57  0.030 / 0.030
G24     316.3          19.6                6.1 +/-    2.54      13.6 +/-    2.54  0.130 / 0.190
G28     65.7           50.4               10.2 +/-    0.70      12.8 +/-    0.70  0.330 / 0.190
G30     154.0          27.9               14.1 +/-    0.83      25.9 +/-    0.83  0.060 / 0.120