PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-21:57:40
G02     214.4          58.6               15.1 +/-    0.68      17.4 +/-    0.68  0.090 / 0.090
G06     61.5           75.0               13.7 +/-    0.48      14.1 +/-    0.48  0.100 / 0.080
G12     318.3          35.3               11.6 +/-    1.73      18.3 +/-    1.73  0.050 / 0.070
G17     54.3           35.7               11.8 +/-    1.88      18.5 +/-    1.88  0.060 / 0.060
G19     35.1           51.7               12.5 +/-    1.62      15.4 +/-    1.62  0.030 / 0.020
G24     267.4          42.0               13.1 +/-    2.68      18.5 +/-    2.68  0.030 / 0.030
G28     121.5          14.9               12.7 +/-    1.48      31.6 +/-    1.48  0.040 / 0.050