PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-18:57:30
G10     248.9          27.1               11.9 +/-    1.98      22.2 +/-    1.98  0.040 / 0.050
G13     54.7           29.7               10.9 +/-    1.72      19.3 +/-    1.72  0.040 / 0.050
G15     90.3           57.8               12.5 +/-    0.80      14.5 +/-    0.80  0.110 / 0.130
G16     297.2          15.9                9.6 +/-    2.61      23.4 +/-    2.61  0.130 / 0.190
G20     268.6          50.6               12.0 +/-    2.57      15.0 +/-    2.57  0.030 / 0.030
G21     331.1          58.1               12.1 +/-    0.77      13.9 +/-    0.77  0.030 / 0.030
G26     269.9          16.2               11.4 +/-    1.12      27.6 +/-    1.12  0.190 / 0.290
G29     163.1          53.1               12.6 +/-    0.40      15.3 +/-    0.40  0.180 / 0.330