PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-18:57:40
G10     244.4          23.1               10.7 +/-    1.93      21.8 +/-    1.93  0.040 / 0.070
G13     60.3           32.3               10.0 +/-    0.96      16.7 +/-    0.96  0.040 / 0.070
G15     102.2          57.7               11.3 +/-    0.65      13.1 +/-    0.65  0.060 / 0.110
G16     302.6          15.6                5.1 +/-    3.34      12.5 +/-    3.34  0.060 / 0.130
G20     261.5          46.9               10.9 +/-    1.28      14.3 +/-    1.28  0.160 / 0.910
G21     325.0          54.2               10.1 +/-    0.75      12.1 +/-    0.75  0.140 / 0.570
G26     275.3          18.0                7.8 +/-    1.85      18.0 +/-    1.85  0.040 / 0.040
G29     160.9          59.4               12.0 +/-    0.95      13.7 +/-    0.95  0.030 / 0.050