PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/08-10:12:40
G02     236.1          75.5                6.5 +/-    0.26       6.7 +/-    0.26  0.180 / 0.170
G05     173.2          13.7                4.7 +/-    1.41      12.2 +/-    1.41  0.180 / 0.180
G06     40.8           66.3                4.2 +/-    0.41       4.5 +/-    0.41  0.080 / 0.120
G12     321.2          48.0                3.8 +/-    0.50       5.0 +/-    0.50  0.090 / 0.090
G17     70.0           22.7                3.6 +/-    1.56       7.4 +/-    1.56  0.030 / 0.040
G19     56.1           39.0                4.1 +/-    1.43       6.0 +/-    1.43  0.040 / 0.040
G24     249.5          36.2                6.4 +/-    1.75      10.0 +/-    1.75  0.040 / 0.020
G25     316.3          10.8              -14.9 +/-   18.13     -40.8 +/-   18.13  0.040 / 0.020