PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-01:28:10
G01     126.0          12.6                6.4 +/-    2.94      16.8 +/-    2.94  0.130 / 0.070
G07     56.4           69.3                3.8 +/-    0.46       4.0 +/-    0.46  0.080 / 0.070
G08     50.1           39.6                3.8 +/-    1.25       5.5 +/-    1.25  0.030 / 0.020
G09     178.8          35.6                5.6 +/-    0.72       8.8 +/-    0.72  0.040 / 0.030
G11     119.1          35.3                5.8 +/-    0.93       9.2 +/-    0.93  0.050 / 0.050
G13     321.2          11.7               -2.0 +/-   13.49      -5.4 +/-   13.49  0.060 / 0.050
G17     200.4          15.9                6.5 +/-    1.93      15.9 +/-    1.93  0.140 / 0.210
G28     279.3          54.1                2.9 +/-    2.98       3.5 +/-    2.98  0.150 / 0.150
G30     340.3          64.2                2.7 +/-    0.74       2.9 +/-    0.74  0.250 / 0.270