PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/20-04:13:10
G02     239.7          75.8                4.9 +/-    0.37       5.1 +/-    0.37  0.100 / 0.090
G05     171.9          15.2                4.7 +/-    1.97      11.7 +/-    1.97  0.120 / 0.080
G06     40.0           65.4                2.8 +/-    0.56       3.0 +/-    0.56  0.030 / 0.040
G12     320.8          48.2                2.7 +/-    0.66       3.5 +/-    0.66  0.030 / 0.040
G17     70.7           21.1                3.3 +/-    1.13       7.0 +/-    1.13  0.130 / 0.240
G19     54.9           40.0                3.7 +/-    1.50       5.4 +/-    1.50  0.140 / 0.260
G24     243.4          35.2                5.6 +/-    1.94       8.9 +/-    1.94  0.060 / 0.090
G25     316.3          13.8                0.8 +/-    1.66       2.2 +/-    1.66  0.050 / 0.050