PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/16-03:27:50
G01     118.0          18.5                6.9 +/-    2.47      15.8 +/-    2.47  0.040 / 0.030
G07     87.2           64.0                4.3 +/-    1.28       4.8 +/-    1.28  0.040 / 0.040
G08     43.7           27.9                2.4 +/-    2.23       4.4 +/-    2.23  0.050 / 0.060
G09     175.3          23.1                5.5 +/-    1.70      11.3 +/-    1.70  0.060 / 0.070
G11     102.8          40.6                4.8 +/-    0.60       6.9 +/-    0.60  0.120 / 0.220
G13     316.9          20.8                1.8 +/-    1.92       3.8 +/-    1.92  0.130 / 0.190
G17     200.7          28.3                5.8 +/-    1.61      10.5 +/-    1.61  0.130 / 0.360
G18     89.4           20.9                5.1 +/-    1.10      11.0 +/-    1.10  0.170 / 0.430
G28     291.4          56.5               -5.7 +/-    1.27      -6.6 +/-    1.27  0.030 / 0.030
G30     345.4          68.7                3.3 +/-    0.57       3.5 +/-    0.57  0.030 / 0.020