PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-03:12:40
G01     220.2          12.6                4.3 +/-    2.40      11.4 +/-    2.40  0.130 / 0.400
G03     272.7          69.8                4.8 +/-    1.27       5.1 +/-    1.27  0.150 / 0.280
G09     297.7          12.2                2.8 +/-   10.80       7.4 +/-   10.80  0.110 / 0.220
G14     90.2           22.7                4.1 +/-    2.01       8.5 +/-    2.01  0.120 / 0.240
G16     138.0          50.7                6.2 +/-    0.53       7.8 +/-    0.53  0.380 / 0.440
G22     209.7          65.8                5.7 +/-    0.70       6.2 +/-    0.70  0.370 / 0.320
G23     312.9          43.2                4.6 +/-    0.81       6.4 +/-    0.81  0.030 / 0.030
G26     85.3           54.0                5.0 +/-    0.97       6.0 +/-    0.97  0.030 / 0.030
G31     48.3           25.7                4.0 +/-    2.64       7.6 +/-    2.64  0.040 / 0.070