PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/06-23:13:00
G07     334.9          58.6                6.8 +/-    1.06       7.8 +/-    1.06  0.030 / 0.050
G08     99.1           52.6                9.6 +/-    0.52      11.8 +/-    0.52  0.030 / 0.050
G09     192.5          72.9                7.4 +/-    0.67       7.7 +/-    0.67  0.090 / 0.180
G11     146.7          13.3                8.4 +/-    2.14      21.7 +/-    2.14  0.090 / 0.140
G23     155.7          39.1                9.8 +/-    0.58      14.5 +/-    0.58  0.060 / 0.090
G27     52.9           30.2                7.4 +/-    0.66      12.9 +/-    0.66  0.060 / 0.080
G28     238.9          31.5                8.1 +/-    1.67      13.8 +/-    1.67  0.040 / 0.080
G30     305.8          39.6                6.6 +/-    0.98       9.7 +/-    0.98  0.040 / 0.090