PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-15:28:10
G07     320.1          54.1                9.8 +/-    0.70      11.8 +/-    0.70  0.180 / 0.210
G08     121.9          44.1               10.6 +/-    0.57      14.5 +/-    0.57  0.120 / 0.170
G09     285.4          81.3                8.6 +/-    0.80       8.7 +/-    0.80  0.050 / 0.040
G16     42.7           22.2                8.1 +/-    1.82      16.8 +/-    1.82  0.040 / 0.050
G23     147.8          57.7               11.1 +/-    0.91      12.8 +/-    0.91  0.170 / 0.390
G27     74.7           37.5               10.1 +/-    1.29      15.4 +/-    1.29  0.220 / 0.520
G28     226.1          12.3               -0.8 +/-   20.57      -2.0 +/-   20.57  0.060 / 0.060
G30     290.7          27.1               11.0 +/-    1.60      20.5 +/-    1.60  0.060 / 0.060