PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/03-18:57:50
G01     117.9          18.9               12.6 +/-    1.35      28.5 +/-    1.35  0.070 / 0.070
G07     83.3           66.2               11.3 +/-    0.43      12.3 +/-    0.43  0.040 / 0.090
G08     45.3           33.1                9.2 +/-    0.94      15.2 +/-    0.94  0.130 / 0.330
G09     177.1          24.9               11.7 +/-    1.55      22.8 +/-    1.55  0.110 / 0.290
G11     106.6          40.5               13.4 +/-    1.17      19.3 +/-    1.17  0.020 / 0.050
G13     317.1          20.3                8.9 +/-    4.36      19.4 +/-    4.36  0.020 / 0.050
G17     203.2          22.5               12.6 +/-    1.08      26.2 +/-    1.08  0.050 / 0.080
G18     93.3           21.4               11.9 +/-    0.73      25.4 +/-    0.73  0.060 / 0.090
G28     295.9          58.1               10.9 +/-    1.04      12.6 +/-    1.04  0.050 / 0.060
G30     352.7          70.7               11.4 +/-    1.49      12.0 +/-    1.49  0.050 / 0.060