PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-16:43:10
G03     186.6          13.0               12.2 +/-    2.82      31.8 +/-    2.82  0.070 / 0.120
G07     297.7          41.4               11.4 +/-    1.06      16.2 +/-    1.06  0.080 / 0.110
G08     139.4          33.2               13.2 +/-    1.28      21.7 +/-    1.28  0.030 / 0.050
G09     317.0          70.2               12.1 +/-    0.35      12.8 +/-    0.35  0.030 / 0.050
G16     41.7           30.3                8.1 +/-    0.92      14.1 +/-    0.92  0.060 / 0.100
G23     134.6          66.8               13.2 +/-    0.95      14.3 +/-    0.95  0.060 / 0.100
G27     89.3           36.2               11.6 +/-    0.72      18.0 +/-    0.72  0.060 / 0.130
G30     280.2          18.4               11.0 +/-    1.47      25.1 +/-    1.47  0.060 / 0.160