PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-22:12:50
G01     249.9          34.7               12.8 +/-    1.57      20.4 +/-    1.57  0.030 / 0.030
G03     315.7          44.6               10.3 +/-    0.91      13.9 +/-    0.91  0.030 / 0.030
G11     236.8          12.3               11.3 +/-    1.93      30.0 +/-    1.93  0.030 / 0.040
G14     61.6           40.0                9.7 +/-    1.98      14.2 +/-    1.98  0.050 / 0.040
G16     165.5          17.1               -5.6 +/-   10.95     -13.2 +/-   10.95  0.120 / 0.280
G22     303.8          66.3               11.3 +/-    0.59      12.2 +/-    0.59  0.140 / 0.210
G23     287.1          19.3               10.7 +/-    1.70      23.9 +/-    1.70  0.060 / 0.080
G26     137.8          38.2               13.5 +/-    1.15      20.3 +/-    1.15  0.060 / 0.090
G31     40.1           59.6               10.9 +/-    0.44      12.4 +/-    0.44  0.100 / 0.090
G32     77.9           23.1               10.1 +/-    2.07      20.6 +/-    2.07  0.090 / 0.100