PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/19-06:57:40
G02     218.8          66.0                5.1 +/-    0.84       5.5 +/-    0.84  0.210 / 0.410
G06     53.6           75.5                3.6 +/-    0.76       3.7 +/-    0.76  0.210 / 0.470
G12     319.3          37.8                1.4 +/-    1.02       2.2 +/-    1.02  0.080 / 0.090
G17     60.5           30.3                3.0 +/-    1.44       5.2 +/-    1.44  0.070 / 0.070
G19     44.6           46.1                2.3 +/-    0.48       3.1 +/-    0.48  0.030 / 0.070
G24     262.0          40.5                6.4 +/-    1.58       9.3 +/-    1.58  0.050 / 0.070
G28     125.4          10.2                5.1 +/-    6.36      14.2 +/-    6.36  0.060 / 0.080