PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-17:27:50
G10     257.6          31.4               12.1 +/-    2.30      20.6 +/-    2.30  0.160 / 0.230
G13     48.0           26.2               11.2 +/-    2.02      21.2 +/-    2.02  0.110 / 0.170
G15     70.4           53.7               12.1 +/-    0.44      14.6 +/-    0.44  0.050 / 0.080
G16     293.5          12.8                9.4 +/-    2.42      24.6 +/-    2.42  0.070 / 0.080
G18     284.4          61.6               10.8 +/-    0.56      12.1 +/-    0.56  0.050 / 0.060
G20     47.1           43.6               11.1 +/-    0.91      15.2 +/-    0.91  0.040 / 0.050
G21     353.4          68.2               10.6 +/-    1.08      11.3 +/-    1.08  0.160 / 0.460
G26     264.2          12.1               11.2 +/-    2.70      29.9 +/-    2.70  0.170 / 0.500
G27     321.3          12.7                9.4 +/-    2.17      24.6 +/-    2.17  0.140 / 0.420
G29     164.1          35.6               14.1 +/-    0.96      22.1 +/-    0.96  0.100 / 0.320