PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-06:12:40
G01     61.8           31.0                3.4 +/-    0.77       5.8 +/-    0.77  0.030 / 0.080
G07     141.5          23.3                6.5 +/-    1.10      13.2 +/-    1.10  0.030 / 0.070
G11     49.4           25.2                3.6 +/-    1.57       6.9 +/-    1.57  0.060 / 0.140
G13     266.0          35.5                8.1 +/-    1.32      12.8 +/-    1.32  0.050 / 0.170
G15     294.8          16.7                3.5 +/-    1.40       8.4 +/-    1.40  0.030 / 0.030
G17     255.8          76.2                6.4 +/-    0.58       6.6 +/-    0.58  0.030 / 0.030
G19     231.5          50.6                8.4 +/-    0.67      10.5 +/-    0.67  0.090 / 0.180
G28     34.4           56.8                4.2 +/-    0.61       4.9 +/-    0.61  0.090 / 0.220
G30     141.9          52.1                9.3 +/-    1.16      11.4 +/-    1.16  0.080 / 0.120