PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:27:50
G01     122.6          15.4               12.6 +/-    1.89      31.0 +/-    1.89  0.050 / 0.070
G07     68.7           68.5               12.0 +/-    0.59      12.8 +/-    0.59  0.040 / 0.050
G08     47.7           36.9                9.7 +/-    0.99      14.9 +/-    0.99  0.030 / 0.030
G09     177.5          30.1               14.2 +/-    2.04      24.8 +/-    2.04  0.030 / 0.030
G11     112.9          38.1               13.7 +/-    0.87      20.5 +/-    0.87  0.030 / 0.030
G13     319.4          16.1               10.3 +/-    2.78      25.0 +/-    2.78  0.030 / 0.030
G17     201.7          18.0               15.1 +/-    1.49      34.8 +/-    1.49  0.100 / 0.180
G18     98.7           19.2               11.1 +/-    1.97      24.9 +/-    1.97  0.090 / 0.190
G28     285.9          55.8               11.9 +/-    2.72      14.0 +/-    2.72  0.180 / 0.260
G30     341.6          65.8               11.3 +/-    0.64      12.3 +/-    0.64  0.140 / 0.260