PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-07:27:50
G02     37.7           51.5                3.8 +/-    0.99       4.6 +/-    0.99  0.030 / 0.030
G05     131.2          64.5                6.0 +/-    0.60       6.5 +/-    0.60  0.030 / 0.030
G06     54.6           16.1                2.0 +/-    2.07       4.8 +/-    2.07  0.150 / 0.280
G12     199.7          66.0                4.7 +/-    0.64       5.1 +/-    0.64  0.250 / 0.210
G20     201.1          24.1                5.0 +/-    2.70       9.9 +/-    2.70  0.020 / 0.030
G25     293.8          54.4                4.8 +/-    2.01       5.7 +/-    2.01  0.020 / 0.030
G29     309.9          31.2                3.3 +/-    1.06       5.6 +/-    1.06  0.280 / 0.210