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               13.6 +/-    1.05      15.6 +/-    1.05  0.070 / 0.080
G06     54.6           72.1               14.1 +/-    0.38      14.8 +/-    0.38  0.070 / 0.060
G12     319.7          39.7               12.4 +/-    1.35      18.1 +/-    1.35  0.030 / 0.020
G17     57.8           32.1               10.9 +/-    1.45      18.3 +/-    1.45  0.030 / 0.020
G19     36.8           51.0               12.2 +/-    1.88      15.2 +/-    1.88  0.060 / 0.060
G24     262.9          41.7               16.2 +/-    2.48      22.9 +/-    2.48  0.060 / 0.060
G28     123.0          13.3               14.2 +/-    3.23      36.8 +/-    3.23  0.030 / 0.050