PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-00:57:50
G10     291.9          50.7                9.5 +/-    3.24      11.9 +/-    3.24  0.040 / 0.030
G15     47.0           31.8                7.2 +/-    1.19      12.2 +/-    1.19  0.040 / 0.040
G20     340.0          65.1               10.1 +/-    0.61      11.0 +/-    0.61  0.080 / 0.110
G21     75.9           76.6               11.2 +/-    0.25      11.5 +/-    0.25  0.070 / 0.100
G24     103.4          24.6               10.6 +/-    1.02      21.0 +/-    1.02  0.070 / 0.120
G27     306.1          31.6                8.4 +/-    1.01      14.3 +/-    1.01  0.100 / 0.090
G29     167.5          11.4               11.2 +/-    2.85      30.4 +/-    2.85  0.130 / 0.120
G32     208.7          26.1               10.8 +/-    1.32      20.7 +/-    1.32  0.100 / 0.130