PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/26-22:57:40
G10     248.3          26.3               12.6 +/-    1.99      23.9 +/-    1.99  0.040 / 0.050
G13     55.4           30.2               10.3 +/-    2.34      17.9 +/-    2.34  0.050 / 0.050
G15     91.3           57.7               12.2 +/-    0.82      14.1 +/-    0.82  0.060 / 0.130
G16     298.9          15.5                7.0 +/-    2.01      17.2 +/-    2.01  0.140 / 0.150
G20     266.3          48.6               11.4 +/-    4.01      14.7 +/-    4.01  0.030 / 0.030
G21     330.3          57.6               10.5 +/-    0.53      12.1 +/-    0.53  0.030 / 0.040
G26     271.0          16.4               10.9 +/-    1.09      26.2 +/-    1.09  0.110 / 0.330
G29     162.3          52.6               12.6 +/-    0.54      15.4 +/-    0.54  0.100 / 0.300