PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-20:57:50
G03     247.1          70.0               10.6 +/-    0.49      11.2 +/-    0.49  0.040 / 0.050
G09     300.6          14.2                7.7 +/-    2.87      19.5 +/-    2.87  0.030 / 0.050
G14     96.2           17.7               10.9 +/-    1.52      25.5 +/-    1.52  0.070 / 0.140
G16     137.3          55.2                3.3 +/-    0.46       4.0 +/-    0.46  0.080 / 0.120
G22     198.1          59.9               11.0 +/-    1.32      12.5 +/-    1.32  0.030 / 0.050
G23     316.1          45.9                9.7 +/-    1.27      12.9 +/-    1.27  0.030 / 0.050
G26     76.9           53.7               10.1 +/-    0.46      12.2 +/-    0.46  0.100 / 0.230
G31     49.9           23.3                7.1 +/-    0.92      14.5 +/-    0.92  0.110 / 0.300