PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-06:57:50
G02     238.6          76.7                3.2 +/-    0.30       3.3 +/-    0.30  0.160 / 0.220
G05     171.9          15.2                2.2 +/-    3.96       5.6 +/-    3.96  0.120 / 0.210
G06     40.7           64.0                3.2 +/-    0.67       3.5 +/-    0.67  0.030 / 0.050
G12     321.2          48.6                2.4 +/-    1.42       3.0 +/-    1.42  0.030 / 0.050
G17     69.6           23.7                3.0 +/-    0.78       6.1 +/-    0.78  0.180 / 0.330
G19     56.2           39.1                2.1 +/-    0.52       3.1 +/-    0.52  0.050 / 0.100
G24     248.3          35.8                6.1 +/-    0.80       9.5 +/-    0.80  0.050 / 0.100
G25     316.4          10.5              -16.2 +/-   20.53     -44.8 +/-   20.53  0.090 / 0.080