PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-04:27:40
G01     85.2           32.6                2.7 +/-    0.79       4.6 +/-    0.79  0.070 / 0.060
G07     129.3          39.5                5.3 +/-    0.74       7.8 +/-    0.74  0.060 / 0.060
G11     62.3           36.9                4.0 +/-    0.96       6.1 +/-    0.96  0.080 / 0.090
G13     289.3          37.6                0.7 +/-    1.80       1.1 +/-    1.80  0.060 / 0.100
G15     313.5          10.8               -5.7 +/-   12.65     -15.6 +/-   12.65  0.030 / 0.040
G17     217.0          60.6                5.4 +/-    1.28       6.2 +/-    1.28  0.040 / 0.050
G18     56.5           21.0                3.5 +/-    1.86       7.5 +/-    1.86  0.090 / 0.180
G19     216.4          28.9                5.0 +/-    1.49       8.9 +/-    1.49  0.120 / 0.200
G28     352.4          61.6                3.3 +/-    0.44       3.7 +/-    0.44  0.030 / 0.030
G30     114.8          74.4                5.1 +/-    1.19       5.3 +/-    1.19  0.020 / 0.020