PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-10:27:50
G02     234.9          72.4                4.9 +/-    0.70       5.1 +/-    0.70  0.030 / 0.040
G05     174.7          12.3                2.1 +/-    1.79       5.6 +/-    1.79  0.030 / 0.040
G06     41.2           61.7                4.3 +/-    0.43       4.9 +/-    0.43  0.110 / 0.080
G12     321.4          49.6                4.2 +/-    0.59       5.3 +/-    0.59  0.090 / 0.070
G17     70.0           21.6                5.2 +/-    1.39      11.0 +/-    1.39  0.180 / 0.260
G19     51.9           42.5                5.1 +/-    1.27       7.1 +/-    1.27  0.120 / 0.300
G24     242.7          35.8                5.9 +/-    2.50       9.3 +/-    2.50  0.070 / 0.110
G25     316.2          14.7                1.2 +/-    1.75       3.0 +/-    1.75  0.070 / 0.120