PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-02:27:30
G02     42.3           46.9                8.1 +/-    1.14      10.7 +/-    1.14  0.030 / 0.040
G05     112.2          68.3               10.4 +/-    0.61      11.1 +/-    0.61  0.030 / 0.030
G06     58.2           11.3                6.5 +/-    2.02      17.6 +/-    2.02  0.050 / 0.050
G12     194.3          59.2               12.0 +/-    0.40      13.7 +/-    0.40  0.050 / 0.040
G25     278.0          58.5                2.3 +/-    0.89       2.6 +/-    0.89  0.020 / 0.020
G29     316.6          39.4                8.7 +/-    1.26      12.7 +/-    1.26  0.030 / 0.020