PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/11-13:28:00
G10     246.5          25.3                4.9 +/-    1.29       9.5 +/-    1.29  0.210 / 0.460
G13     57.5           31.0                5.1 +/-    1.21       8.7 +/-    1.21  0.210 / 0.400
G15     90.0           56.4                6.8 +/-    1.15       7.9 +/-    1.15  0.040 / 0.040
G16     299.9          15.9                3.6 +/-    2.59       8.7 +/-    2.59  0.040 / 0.040
G20     266.4          50.7                7.5 +/-    3.37       9.3 +/-    3.37  0.030 / 0.040
G21     330.0          57.3                4.0 +/-    0.47       4.7 +/-    0.47  0.040 / 0.040
G26     273.5          17.1                4.9 +/-    5.03      11.5 +/-    5.03  0.130 / 0.130
G29     162.0          56.9                7.9 +/-    0.54       9.2 +/-    0.54  0.100 / 0.190