PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-04:12:30
G02     202.4          36.6                5.5 +/-    2.12       8.5 +/-    2.12  0.040 / 0.050
G06     165.6          67.4                4.5 +/-    1.05       4.9 +/-    1.05  0.040 / 0.040
G12     307.3          14.0                2.4 +/-    2.51       6.1 +/-    2.51  0.050 / 0.140
G17     34.8           50.3                1.5 +/-    0.43       1.9 +/-    0.43  0.050 / 0.140
G19     2.5            65.0                1.9 +/-    0.51       2.1 +/-    0.51  0.030 / 0.040
G24     298.8          37.5                2.8 +/-    0.98       4.2 +/-    0.98  0.040 / 0.050
G28     102.9          30.6                4.9 +/-    0.53       8.4 +/-    0.53  0.080 / 0.200