PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/08-09:27:40
G10     271.5          41.4                4.8 +/-    0.89       6.8 +/-    0.89  0.030 / 0.030
G13     40.1           14.7                2.3 +/-    4.42       5.6 +/-    4.42  0.030 / 0.030
G15     54.9           45.0                3.0 +/-    0.92       4.1 +/-    0.92  0.060 / 0.070
G20     305.9          62.0                4.4 +/-    0.63       5.0 +/-    0.63  0.100 / 0.070
G21     28.4           74.6                4.8 +/-    0.94       5.0 +/-    0.94  0.190 / 0.380
G24     115.3          16.6                5.8 +/-    2.34      13.9 +/-    2.34  0.150 / 0.270
G27     317.9          19.9                2.1 +/-    1.78       4.6 +/-    1.78  0.040 / 0.040
G29     165.5          22.7                5.5 +/-    2.02      11.3 +/-    2.02  0.030 / 0.050