PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-02:28:10
G01     101.2          28.4                4.1 +/-    1.09       7.5 +/-    1.09  0.040 / 0.040
G07     114.8          53.8                4.4 +/-    0.73       5.3 +/-    0.73  0.030 / 0.040
G08     41.8           16.6                2.4 +/-    2.13       5.8 +/-    2.13  0.020 / 0.030
G11     83.5           42.9                3.8 +/-    0.83       5.2 +/-    0.83  0.020 / 0.030
G13     305.6          31.1                2.7 +/-    1.78       4.7 +/-    1.78  0.120 / 0.240
G17     208.7          43.3                4.4 +/-    0.75       6.1 +/-    0.75  0.200 / 0.220
G19     210.7          18.8                3.0 +/-    2.07       6.7 +/-    2.07  0.040 / 0.060
G28     331.0          61.7                1.8 +/-    0.47       2.0 +/-    0.47  0.040 / 0.060
G30     71.7           77.9                3.1 +/-    1.64       3.1 +/-    1.64  0.060 / 0.110