PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-06:28:30
G01     56.2           28.9                3.8 +/-    1.01       6.7 +/-    1.01  0.040 / 0.050
G06     182.7          14.7                4.7 +/-    2.26      11.7 +/-    2.26  0.040 / 0.060
G07     143.9          18.2                4.7 +/-    0.81      10.9 +/-    0.81  0.090 / 0.250
G11     47.0           20.9                3.5 +/-    1.12       7.6 +/-    1.12  0.100 / 0.240
G13     259.5          33.5                7.9 +/-    1.57      12.8 +/-    1.57  0.090 / 0.200
G15     289.6          16.7                5.1 +/-    1.72      12.3 +/-    1.72  0.090 / 0.210
G17     281.1          78.8                6.8 +/-    0.96       6.9 +/-    0.96  0.050 / 0.100
G19     237.8          55.6                8.1 +/-    1.21       9.6 +/-    1.21  0.060 / 0.080
G28     43.2           55.0                4.7 +/-    0.36       5.6 +/-    0.36  0.030 / 0.030
G30     145.5          46.6                9.2 +/-    1.09      12.1 +/-    1.09  0.020 / 0.030