PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-14:28:10
G10     278.3          45.6                6.8 +/-    1.02       9.1 +/-    1.02  0.100 / 0.130
G15     50.0           37.9                5.1 +/-    0.53       7.6 +/-    0.53  0.110 / 0.140
G20     324.5          64.9                4.2 +/-    1.19       4.6 +/-    1.19  0.040 / 0.040
G21     36.6           76.0                5.4 +/-    0.95       5.5 +/-    0.95  0.040 / 0.050
G24     114.4          19.3                9.3 +/-    0.96      20.9 +/-    0.96  0.130 / 0.250
G27     313.9          25.7                3.9 +/-    1.98       7.4 +/-    1.98  0.120 / 0.230
G29     168.2          23.1                6.5 +/-    1.59      13.4 +/-    1.59  0.070 / 0.170
G32     204.9          18.8                4.8 +/-    1.66      10.9 +/-    1.66  0.060 / 0.140