PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/19-14:28:10
G10     293.4          51.5                5.7 +/-    2.43       7.1 +/-    2.43  0.050 / 0.080
G15     46.2           27.9                5.2 +/-    1.75       9.5 +/-    1.75  0.060 / 0.100
G20     352.0          65.4                6.5 +/-    0.40       7.1 +/-    0.40  0.040 / 0.040
G21     84.3           75.0                7.5 +/-    0.39       7.8 +/-    0.39  0.040 / 0.030
G24     103.7          25.0                9.9 +/-    1.33      19.3 +/-    1.33  0.210 / 0.230
G27     304.8          32.7                4.9 +/-    2.15       8.1 +/-    2.15  0.250 / 0.290
G29     168.1          12.3                6.8 +/-    2.19      18.0 +/-    2.19  0.120 / 0.070
G32     208.0          29.6                7.7 +/-    2.14      13.6 +/-    2.14  0.110 / 0.070