PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-20:42:50
G10     291.3          50.6                9.5 +/-    3.43      11.9 +/-    3.43  0.040 / 0.030
G15     47.3           32.9                7.5 +/-    0.87      12.3 +/-    0.87  0.040 / 0.040
G20     342.6          65.3                9.9 +/-    0.66      10.8 +/-    0.66  0.050 / 0.090
G21     72.9           76.9               11.0 +/-    0.50      11.2 +/-    0.50  0.060 / 0.080
G24     104.9          24.4               11.6 +/-    1.26      22.9 +/-    1.26  0.080 / 0.120
G27     306.3          31.7                9.1 +/-    0.64      15.5 +/-    0.64  0.070 / 0.110
G29     168.1          13.0               12.6 +/-    1.23      32.9 +/-    1.23  0.070 / 0.110
G32     208.0          27.2               12.4 +/-    1.77      23.1 +/-    1.77  0.090 / 0.150