PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-03:57:40
G01     71.0           31.8                4.1 +/-    1.18       6.9 +/-    1.18  0.030 / 0.030
G07     135.5          33.7                6.8 +/-    1.05      11.0 +/-    1.05  0.040 / 0.030
G11     57.6           36.7                4.6 +/-    1.44       7.1 +/-    1.44  0.120 / 0.210
G13     276.0          39.1                5.4 +/-    1.31       8.0 +/-    1.31  0.110 / 0.180
G15     301.7          16.3                2.1 +/-    1.88       5.0 +/-    1.88  0.080 / 0.100
G17     227.4          68.0                6.9 +/-    0.93       7.3 +/-    0.93  0.100 / 0.100
G19     221.2          42.2                7.3 +/-    1.47      10.3 +/-    1.47  0.040 / 0.050
G28     356.2          61.5                5.3 +/-    0.60       6.0 +/-    0.60  0.040 / 0.050
G30     133.0          68.9                6.2 +/-    0.40       6.6 +/-    0.40  0.110 / 0.070