PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/04-06:57:40
G01     65.9           32.1                5.8 +/-    0.73       9.8 +/-    0.73  0.040 / 0.040
G07     139.7          26.5                8.4 +/-    2.51      15.9 +/-    2.51  0.040 / 0.050
G11     51.3           27.6                4.1 +/-    2.07       7.5 +/-    2.07  0.020 / 0.020
G13     270.9          36.4                5.0 +/-    0.97       7.7 +/-    0.97  0.030 / 0.030
G15     298.5          16.3                3.4 +/-    2.28       8.2 +/-    2.28  0.110 / 0.220
G17     244.2          73.8                8.1 +/-    0.48       8.4 +/-    0.48  0.090 / 0.230
G19     227.9          47.3                6.5 +/-    2.41       8.5 +/-    2.41  0.060 / 0.100
G28     28.0           57.9                7.2 +/-    2.04       8.3 +/-    2.04  0.050 / 0.110
G30     138.9          56.5                9.6 +/-    0.36      11.3 +/-    0.36  0.040 / 0.070