PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-17:28:10
G10     259.5          35.1               10.9 +/-    1.10      17.3 +/-    1.10  0.120 / 0.280
G13     45.6           22.6                6.2 +/-    0.88      12.9 +/-    0.88  0.150 / 0.250
G15     67.3           52.7                8.3 +/-    0.32      10.2 +/-    0.32  0.050 / 0.050
G16     285.5          14.8                8.1 +/-    1.57      20.4 +/-    1.57  0.050 / 0.050
G20     287.0          58.0               10.8 +/-    0.92      12.5 +/-    0.92  0.160 / 0.400
G21     347.5          66.3                7.8 +/-    0.49       8.4 +/-    0.49  0.180 / 0.560
G26     259.6          11.4               11.0 +/-    2.06      29.8 +/-    2.06  0.030 / 0.070
G27     321.5          12.6                6.7 +/-    2.81      17.7 +/-    2.81  0.040 / 0.060
G29     166.2          40.5               11.2 +/-    0.68      16.2 +/-    0.68  0.080 / 0.110