PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-18:57:40
G02     216.4          58.7               13.8 +/-    0.50      15.9 +/-    0.50  0.040 / 0.070
G06     56.0           72.7               12.6 +/-    0.98      13.2 +/-    0.98  0.040 / 0.080
G12     319.5          39.0               10.5 +/-    0.59      15.5 +/-    0.59  0.040 / 0.050
G17     57.2           32.7                9.9 +/-    0.88      16.3 +/-    0.88  0.030 / 0.050
G19     36.1           51.3               10.6 +/-    0.62      13.1 +/-    0.62  0.060 / 0.090
G24     263.9          41.8               12.9 +/-    1.78      18.2 +/-    1.78  0.080 / 0.090
G28     122.6          13.7               12.1 +/-    1.45      31.0 +/-    1.45  0.120 / 0.370