PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/09-07:57:50
G05     49.5           14.5                1.2 +/-    2.60       3.0 +/-    2.60  0.140 / 0.250
G10     237.3          14.8                5.1 +/-    1.43      12.8 +/-    1.43  0.190 / 0.190
G13     72.7           35.6                6.0 +/-    1.50       9.5 +/-    1.50  0.110 / 0.210
G15     119.6          53.6                6.8 +/-    0.57       8.2 +/-    0.57  0.090 / 0.200
G20     250.1          38.7                7.2 +/-    1.05      10.7 +/-    1.05  0.020 / 0.030
G21     318.9          51.2                4.9 +/-    0.83       6.1 +/-    0.83  0.030 / 0.040
G26     290.2          18.6                4.6 +/-    0.96      10.5 +/-    0.96  0.060 / 0.060
G29     152.0          64.5                7.3 +/-    1.05       8.0 +/-    1.05  0.050 / 0.060