PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-14:43:10
G02     57.9           33.6                5.6 +/-    0.86       9.1 +/-    0.86  0.030 / 0.030
G05     64.8           66.2                6.7 +/-    0.50       7.3 +/-    0.50  0.040 / 0.030
G12     182.8          33.4                7.1 +/-    3.28      11.7 +/-    3.28  0.100 / 0.350
G13     128.1          13.6                8.1 +/-    1.92      20.7 +/-    1.92  0.150 / 0.430
G15     163.8          11.7                6.9 +/-   10.13      18.6 +/-   10.13  0.050 / 0.090
G21     270.0          15.6                5.9 +/-    1.31      14.4 +/-    1.31  0.050 / 0.090
G25     240.7          53.4                6.5 +/-    1.09       7.9 +/-    1.09  0.050 / 0.070
G29     326.7          51.8                5.3 +/-    0.94       6.6 +/-    0.94  0.040 / 0.070