PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-15:57:40
G01     309.9          30.9                4.7 +/-    1.33       8.0 +/-    1.33  0.120 / 0.220
G10     102.3          42.9                7.1 +/-    0.36       9.8 +/-    0.36  0.080 / 0.170
G11     288.5          26.8                5.1 +/-    0.97       9.5 +/-    0.97  0.090 / 0.240
G14     344.5          68.6                3.1 +/-    1.07       3.3 +/-    1.07  0.100 / 0.260
G22     308.7          24.4                7.2 +/-    2.33      14.2 +/-    2.33  0.030 / 0.040
G25     86.2           15.7                8.1 +/-    1.11      19.8 +/-    1.11  0.040 / 0.060
G31     168.5          61.8                6.8 +/-    1.67       7.6 +/-    1.67  0.030 / 0.060
G32     33.2           54.4                5.2 +/-    0.98       6.2 +/-    0.98  0.030 / 0.070