PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-15:57:30
G01     309.9          30.9                8.6 +/-    1.25      14.8 +/-    1.25  0.110 / 0.140
G10     102.3          42.9                7.3 +/-    0.61      10.1 +/-    0.61  0.110 / 0.160
G11     288.5          26.8                6.2 +/-    3.11      11.6 +/-    3.11  0.040 / 0.030
G14     344.5          68.6                5.5 +/-    0.50       5.9 +/-    0.50  0.020 / 0.030
G22     308.7          24.4                8.6 +/-    1.88      17.0 +/-    1.88  0.030 / 0.040
G25     86.2           15.7                8.7 +/-    2.53      21.2 +/-    2.53  0.040 / 0.040
G31     168.5          61.8               10.1 +/-    0.37      11.2 +/-    0.37  0.110 / 0.210
G32     33.2           54.4                5.2 +/-    1.55       6.2 +/-    1.55  0.070 / 0.170