PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-18:42:20
G02     29.2           58.4               10.4 +/-    0.76      12.0 +/-    0.76  0.030 / 0.040
G05     142.1          61.1               12.2 +/-    0.37      13.8 +/-    0.37  0.030 / 0.040
G06     53.9           14.6                8.1 +/-    1.86      20.3 +/-    1.86  0.030 / 0.040
G12     190.2          65.7               10.3 +/-    0.80      11.1 +/-    0.80  0.030 / 0.030
G19     98.0           13.3               10.7 +/-    2.02      27.6 +/-    2.02  0.040 / 0.060
G25     297.6          53.6               10.3 +/-    1.57      12.5 +/-    1.57  0.040 / 0.060
G29     305.9          25.9               10.0 +/-    0.85      19.2 +/-    0.85  0.250 / 0.170