PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-05:12:30
G01     90.2           31.8                4.8 +/-    0.70       8.0 +/-    0.70  0.050 / 0.050
G07     125.5          45.1                7.5 +/-    0.49      10.0 +/-    0.49  0.050 / 0.040
G11     69.7           39.8                4.3 +/-    0.52       6.3 +/-    0.52  0.030 / 0.040
G13     295.9          35.1                4.7 +/-    6.22       7.5 +/-    6.22  0.030 / 0.040
G17     214.5          54.4                6.8 +/-    1.13       8.1 +/-    1.13  0.090 / 0.100
G19     214.5          28.2                6.7 +/-    1.40      12.1 +/-    1.40  0.080 / 0.090
G28     350.6          61.6                3.5 +/-    0.46       4.0 +/-    0.46  0.040 / 0.060
G30     106.2          74.2                5.0 +/-    0.63       5.2 +/-    0.63  0.040 / 0.070