PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-08:42:50
G01     107.3          24.0                3.9 +/-    0.82       7.7 +/-    0.82  0.050 / 0.030
G07     104.7          58.1                5.6 +/-    0.63       6.4 +/-    0.63  0.030 / 0.030
G08     42.4           24.2                1.9 +/-    1.87       3.8 +/-    1.87  0.030 / 0.050
G09     174.5          15.0                6.5 +/-    2.47      16.2 +/-    2.47  0.030 / 0.050
G11     93.5           44.2                5.5 +/-    0.36       7.4 +/-    0.36  0.070 / 0.090
G13     310.5          28.6                3.0 +/-    0.94       5.4 +/-    0.94  0.060 / 0.100
G17     204.6          33.6                6.1 +/-    1.40       9.9 +/-    1.40  0.060 / 0.170
G18     81.8           23.9                3.0 +/-    0.86       6.1 +/-    0.86  0.060 / 0.160
G28     300.5          57.0                3.8 +/-    1.10       4.4 +/-    1.10  0.110 / 0.240
G30     6.7            76.4                5.5 +/-    0.67       5.6 +/-    0.67  0.110 / 0.280