PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-05:12:40
G01     90.2           31.8                5.1 +/-    0.53       8.7 +/-    0.53  0.040 / 0.060
G07     125.5          45.1                6.8 +/-    1.66       9.2 +/-    1.66  0.040 / 0.060
G11     69.7           39.8                3.9 +/-    0.78       5.7 +/-    0.78  0.030 / 0.060
G13     295.9          35.1                3.8 +/-    1.28       6.1 +/-    1.28  0.040 / 0.070
G15     315.1          10.4               -8.7 +/-   10.54     -23.9 +/-   10.54  0.040 / 0.050
G17     214.5          54.4                7.0 +/-    0.91       8.4 +/-    0.91  0.040 / 0.050
G19     214.5          28.2                5.4 +/-    2.46       9.9 +/-    2.46  0.070 / 0.280
G28     350.6          61.6                2.4 +/-    0.66       2.7 +/-    0.66  0.180 / 0.320
G30     106.2          74.2                4.8 +/-    0.52       5.0 +/-    0.52  0.100 / 0.090