PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-18:42:50
G02     216.9          59.2               15.0 +/-    0.82      17.1 +/-    0.82  0.040 / 0.080
G06     54.6           72.1               15.6 +/-    0.93      16.4 +/-    0.93  0.030 / 0.090
G12     319.7          39.7               14.1 +/-    0.71      20.6 +/-    0.71  0.040 / 0.060
G17     57.8           32.1               12.7 +/-    0.86      21.4 +/-    0.86  0.030 / 0.060
G19     36.8           51.0               12.8 +/-    0.45      16.0 +/-    0.45  0.070 / 0.080
G24     262.9          41.7               16.4 +/-    1.38      23.2 +/-    1.38  0.070 / 0.090
G28     123.0          13.3               15.5 +/-    1.37      40.3 +/-    1.37  0.120 / 0.430