PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-21:27:50
G01     261.1          38.9                7.9 +/-    0.83      11.6 +/-    0.83  0.040 / 0.040
G03     316.5          36.1                6.8 +/-    1.12      10.6 +/-    1.12  0.050 / 0.050
G10     133.7          11.6               10.9 +/-    1.55      29.3 +/-    1.55  0.070 / 0.080
G11     244.7          17.1                8.9 +/-    3.36      21.0 +/-    3.36  0.080 / 0.080
G14     51.8           45.6                5.3 +/-    0.35       7.1 +/-    0.35  0.070 / 0.200
G22     311.8          58.0                6.2 +/-    0.96       7.2 +/-    0.96  0.050 / 0.130
G25     45.8           14.1                5.0 +/-    0.76      12.8 +/-    0.76  0.040 / 0.040
G26     144.8          30.4               11.8 +/-    1.33      20.5 +/-    1.33  0.030 / 0.050
G31     44.9           68.8                6.0 +/-    0.47       6.4 +/-    0.47  0.050 / 0.090
G32     70.1           28.6                6.0 +/-    0.63      10.9 +/-    0.63  0.050 / 0.110