PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-02:12:50
G07     40.3           69.9                6.0 +/-    0.95       6.3 +/-    0.95  0.050 / 0.050
G08     52.9           41.2                3.3 +/-    0.66       4.7 +/-    0.66  0.040 / 0.050
G09     174.4          35.9                7.9 +/-    1.52      12.4 +/-    1.52  0.040 / 0.040
G11     126.9          33.7                7.8 +/-    0.62      12.8 +/-    0.62  0.030 / 0.030
G17     198.6          11.7                2.7 +/-   11.51       7.2 +/-   11.51  0.060 / 0.120
G23     160.9          12.0                4.1 +/-    1.05      10.9 +/-    1.05  0.060 / 0.130
G28     262.7          43.2                5.7 +/-    0.56       7.9 +/-    0.56  0.080 / 0.110
G30     323.9          54.1                5.0 +/-    1.11       6.0 +/-    1.11  0.070 / 0.110