PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-15:13:00
G01     318.2          19.7                5.1 +/-    1.74      11.4 +/-    1.74  0.120 / 0.230
G08     258.0          12.0                6.1 +/-    5.01      16.3 +/-    5.01  0.220 / 0.260
G10     82.9           52.3                4.7 +/-    1.18       5.7 +/-    1.18  0.050 / 0.050
G11     303.4          22.2                5.7 +/-    1.09      11.9 +/-    1.09  0.060 / 0.050
G14     299.8          70.2                5.2 +/-    0.83       5.5 +/-    0.83  0.040 / 0.040
G22     302.1          13.4                6.0 +/-    2.84      15.5 +/-    2.84  0.040 / 0.040
G25     100.0          9.4               -17.4 +/-    5.71     -49.1 +/-    5.71  0.300 / 0.290
G31     174.9          45.2                7.9 +/-    0.37      10.7 +/-    0.37  0.300 / 0.330
G32     13.2           65.3                5.1 +/-    0.53       5.5 +/-    0.53  0.040 / 0.050