PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-06:27:50
G01     66.7           32.3                3.6 +/-    0.91       6.0 +/-    0.91  0.040 / 0.040
G07     139.3          27.2                6.6 +/-    1.34      12.3 +/-    1.34  0.040 / 0.040
G11     51.8           28.3                2.5 +/-    1.52       4.6 +/-    1.52  0.150 / 0.280
G13     271.6          36.5                5.5 +/-    1.27       8.4 +/-    1.27  0.110 / 0.230
G15     299.0          16.3                3.8 +/-    2.95       9.1 +/-    2.95  0.020 / 0.020
G17     242.3          73.1                6.3 +/-    0.44       6.5 +/-    0.44  0.020 / 0.030
G19     227.3          46.6                7.7 +/-    2.48      10.1 +/-    2.48  0.040 / 0.070
G28     27.0           58.1                5.4 +/-    1.44       6.2 +/-    1.44  0.040 / 0.060
G30     138.4          56.8                6.0 +/-    0.52       7.0 +/-    0.52  0.060 / 0.130