PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-10:12:50
G01     320.0          15.8                3.8 +/-    3.65       9.2 +/-    3.65  0.210 / 0.240
G08     259.9          15.0                5.9 +/-    2.46      14.8 +/-    2.46  0.190 / 0.300
G10     75.3           53.9                6.4 +/-    0.59       7.7 +/-    0.59  0.040 / 0.060
G11     305.2          22.0                4.6 +/-    1.42       9.7 +/-    1.42  0.050 / 0.060
G14     288.1          70.5                5.1 +/-    1.02       5.4 +/-    1.02  0.020 / 0.020
G18     306.4          40.0                4.8 +/-    1.99       7.0 +/-    1.99  0.030 / 0.030
G20     102.7          31.2                6.7 +/-    0.89      11.5 +/-    0.89  0.030 / 0.030
G27     227.8          11.5                4.5 +/-    1.51      12.2 +/-    1.51  0.040 / 0.030
G31     177.4          37.5                8.6 +/-    1.40      13.1 +/-    1.40  0.140 / 0.290
G32     342.3          72.0                5.6 +/-    0.66       5.9 +/-    0.66  0.260 / 0.310