PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-04:58:10
G10     244.1          22.2                8.2 +/-    1.79      17.1 +/-    1.79  0.040 / 0.070
G13     61.0           32.8                4.0 +/-    1.58       6.6 +/-    1.58  0.040 / 0.040
G15     100.3          57.1                7.3 +/-    0.45       8.6 +/-    0.45  0.140 / 0.280
G16     306.9          13.6                3.3 +/-    3.50       8.4 +/-    3.50  0.170 / 0.240
G20     260.3          45.7                8.6 +/-    1.95      11.5 +/-    1.95  0.060 / 0.110
G21     327.0          55.8                5.0 +/-    0.89       5.9 +/-    0.89  0.050 / 0.110
G26     278.4          17.7                7.5 +/-    0.57      17.5 +/-    0.57  0.040 / 0.040
G29     158.5          54.9                7.1 +/-    0.92       8.4 +/-    0.92  0.050 / 0.040