PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-10:12:50
G01     62.0           30.5                4.5 +/-    1.11       7.7 +/-    1.11  0.080 / 0.150
G07     140.3          23.6                4.2 +/-    0.85       8.5 +/-    0.85  0.080 / 0.150
G11     50.1           28.0                1.8 +/-    2.39       3.3 +/-    2.39  0.030 / 0.040
G13     264.9          37.3                6.6 +/-    1.61      10.1 +/-    1.61  0.030 / 0.030
G15     297.1          15.9                4.1 +/-    1.38      10.0 +/-    1.38  0.110 / 0.090
G17     243.6          72.4                5.0 +/-    0.67       5.2 +/-    0.67  0.120 / 0.100
G18     43.7           14.5                2.4 +/-    2.86       6.2 +/-    2.86  0.130 / 0.260
G19     228.7          49.9                5.7 +/-    2.67       7.2 +/-    2.67  0.160 / 0.220
G28     16.8           60.4                3.0 +/-    1.48       3.4 +/-    1.48  0.040 / 0.040
G30     141.9          57.4                6.6 +/-    0.53       7.7 +/-    0.53  0.040 / 0.030