PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/29-18:58:10
G10     259.5          35.0               12.5 +/-    1.69      19.9 +/-    1.69  0.040 / 0.040
G13     45.6           22.7               10.9 +/-    1.72      22.5 +/-    1.72  0.040 / 0.040
G15     68.6           53.6               12.0 +/-    0.90      14.5 +/-    0.90  0.140 / 0.470
G16     285.7          14.7                7.5 +/-    1.66      18.8 +/-    1.66  0.130 / 0.420
G20     286.2          57.5               11.6 +/-    1.90      13.4 +/-    1.90  0.070 / 0.210
G21     346.8          66.1               13.4 +/-    1.06      14.5 +/-    1.06  0.100 / 0.210
G26     259.5          11.4               10.4 +/-    5.33      28.2 +/-    5.33  0.030 / 0.040
G27     321.6          12.4                7.6 +/-    2.97      20.1 +/-    2.97  0.040 / 0.040
G29     166.1          40.3               13.1 +/-    0.69      19.0 +/-    0.69  0.310 / 0.250