PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-16:42:40
G07     9.3            67.4               11.0 +/-    0.73      11.8 +/-    0.73  0.050 / 0.050
G08     68.3           50.8               12.5 +/-    0.56      15.7 +/-    0.56  0.050 / 0.050
G09     180.2          51.9               15.9 +/-    2.08      19.6 +/-    2.08  0.040 / 0.060
G11     132.7          25.9               13.5 +/-    0.68      25.8 +/-    0.68  0.040 / 0.060
G23     158.5          17.8               12.5 +/-    3.22      29.1 +/-    3.22  0.040 / 0.050
G27     41.3           18.5                8.9 +/-    0.86      20.3 +/-    0.86  0.040 / 0.050
G28     256.6          44.2               12.0 +/-    1.39      16.3 +/-    1.39  0.070 / 0.160
G30     319.0          49.5               10.9 +/-    0.68      13.8 +/-    0.68  0.070 / 0.160