PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/13-18:28:00
G01     304.0          35.1                9.9 +/-    0.91      15.8 +/-    0.91  0.070 / 0.160
G10     109.4          38.1               10.4 +/-    1.08      15.7 +/-    1.08  0.060 / 0.140
G11     279.7          27.7                8.4 +/-    1.90      15.5 +/-    1.90  0.090 / 0.220
G14     2.9            65.4                9.0 +/-    0.46       9.8 +/-    0.46  0.110 / 0.200
G22     310.8          28.7                7.0 +/-    1.14      12.6 +/-    1.14  0.050 / 0.110
G25     79.0           17.6               11.0 +/-    0.77      25.8 +/-    0.77  0.060 / 0.080
G31     164.3          68.4               14.2 +/-    1.02      15.2 +/-    1.02  0.030 / 0.030
G32     39.7           50.1               10.4 +/-    0.39      13.1 +/-    0.39  0.020 / 0.030