PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-04:42:30
G10     256.2          30.9                7.5 +/-    1.83      13.0 +/-    1.83  0.050 / 0.040
G13     48.5           26.3                4.9 +/-    2.12       9.4 +/-    2.12  0.030 / 0.030
G15     74.6           55.5                6.3 +/-    0.68       7.4 +/-    0.68  0.130 / 0.130
G20     306.9          67.6                5.6 +/-    0.64       6.1 +/-    0.64  0.210 / 0.150
G21     341.4          64.3                5.5 +/-    0.57       6.0 +/-    0.57  0.040 / 0.050
G26     260.7          12.9                7.7 +/-    1.46      20.2 +/-    1.46  0.050 / 0.050
G29     166.6          43.5                7.0 +/-    0.73       9.6 +/-    0.73  0.050 / 0.040