PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-15:27:50
G05     49.6           16.3                5.8 +/-    1.34      14.0 +/-    1.34  0.030 / 0.040
G10     238.4          15.5                9.5 +/-    1.29      23.4 +/-    1.29  0.030 / 0.040
G13     70.9           35.6                8.1 +/-    0.82      12.7 +/-    0.82  0.130 / 0.290
G15     122.4          54.3                9.3 +/-    0.64      11.1 +/-    0.64  0.130 / 0.320
G16     311.7          13.1                4.9 +/-    2.86      12.8 +/-    2.86  0.100 / 0.220
G20     251.5          39.7                9.6 +/-    1.16      14.1 +/-    1.16  0.130 / 0.270
G21     318.7          50.9                8.4 +/-    1.11      10.5 +/-    1.11  0.060 / 0.070
G26     285.5          19.4                7.2 +/-    1.36      16.1 +/-    1.36  0.050 / 0.060
G29     156.6          67.5                9.3 +/-    0.91      10.0 +/-    0.91  0.060 / 0.120