PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/30-18:27:30
G10     248.4          26.7               17.4 +/-    2.53      32.8 +/-    2.53  0.040 / 0.050
G13     55.3           30.0               13.7 +/-    1.70      24.0 +/-    1.70  0.040 / 0.050
G15     90.9           57.7               14.0 +/-    1.01      16.2 +/-    1.01  0.170 / 0.560
G16     297.7          16.0               12.6 +/-    1.61      30.6 +/-    1.61  0.140 / 0.470
G20     267.9          50.4               15.5 +/-    2.50      19.5 +/-    2.50  0.100 / 0.120
G21     330.5          57.7               13.8 +/-    0.68      16.0 +/-    0.68  0.130 / 0.140
G26     270.5          16.4               14.8 +/-    1.95      35.5 +/-    1.95  0.040 / 0.040
G29     162.9          53.9               14.2 +/-    0.40      17.1 +/-    0.40  0.040 / 0.040