PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/09-05:57:50
G01     87.9           32.2                3.8 +/-    1.90       6.4 +/-    1.90  0.060 / 0.040
G07     127.2          43.3                6.8 +/-    0.65       9.4 +/-    0.65  0.060 / 0.050
G11     67.2           38.8                3.7 +/-    0.96       5.5 +/-    0.96  0.130 / 0.160
G13     293.8          35.6                5.4 +/-    2.79       8.4 +/-    2.79  0.110 / 0.190
G15     313.8          11.2               -2.6 +/-   11.78      -7.0 +/-   11.78  0.050 / 0.030
G17     216.0          56.6                7.0 +/-    0.96       8.2 +/-    0.96  0.040 / 0.030
G19     215.4          30.0                5.8 +/-    3.04      10.1 +/-    3.04  0.090 / 0.080
G28     354.4          61.5                3.6 +/-    0.83       4.0 +/-    0.83  0.080 / 0.080
G30     111.0          73.2                6.0 +/-    1.10       6.2 +/-    1.10  0.040 / 0.050