PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-19:27:40
G10     251.0          28.8               13.6 +/-    2.10      24.4 +/-    2.10  0.040 / 0.040
G13     52.5           28.4                8.9 +/-    2.15      16.2 +/-    2.15  0.040 / 0.040
G15     85.8           57.7               11.5 +/-    1.02      13.3 +/-    1.02  0.090 / 0.200
G16     294.8          15.9                8.4 +/-    1.80      20.6 +/-    1.80  0.060 / 0.180
G20     271.8          52.0               13.2 +/-    2.46      16.2 +/-    2.46  0.030 / 0.040
G21     334.0          59.7               10.6 +/-    0.42      12.1 +/-    0.42  0.040 / 0.040
G26     267.6          15.3                9.7 +/-    2.99      23.8 +/-    2.99  0.130 / 0.340
G29     163.8          50.2               12.7 +/-    0.61      16.0 +/-    0.61  0.150 / 0.340