PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-12:42:50
G01     222.3          13.0                5.0 +/-    3.77      13.0 +/-    3.77  0.260 / 0.380
G03     265.9          70.6                7.1 +/-    0.46       7.4 +/-    0.46  0.180 / 0.480
G09     297.6          11.2               -1.2 +/-   26.46      -3.2 +/-   26.46  0.040 / 0.040
G16     138.2          51.5               10.4 +/-    1.12      12.9 +/-    1.12  0.080 / 0.050
G22     196.7          62.9                8.7 +/-    0.39       9.7 +/-    0.39  0.110 / 0.340
G23     314.8          45.4                5.2 +/-    1.17       7.0 +/-    1.17  0.110 / 0.420
G26     82.9           53.4                7.6 +/-    0.44       9.2 +/-    0.44  0.030 / 0.050
G31     48.3           25.2                5.5 +/-    1.79      10.7 +/-    1.79  0.030 / 0.050