PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-09:27:30
G02     294.2          82.3                4.4 +/-    0.69       4.5 +/-    0.69  0.090 / 0.090
G05     168.5          24.0                3.8 +/-    0.92       7.6 +/-    0.92  0.080 / 0.080
G06     38.5           55.3                4.4 +/-    0.79       5.2 +/-    0.79  0.030 / 0.040
G12     319.8          59.3                4.7 +/-    0.72       5.4 +/-    0.72  0.040 / 0.030
G17     78.8           16.6                5.6 +/-    2.53      13.5 +/-    2.53  0.090 / 0.120
G19     66.8           32.3                3.7 +/-    2.20       6.3 +/-    2.20  0.080 / 0.130
G24     237.9          29.7                3.6 +/-    1.97       6.3 +/-    1.97  0.250 / 0.330
G25     317.8          20.1                3.3 +/-    2.19       7.3 +/-    2.19  0.310 / 0.280