PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-18:27:50
G01     106.3          26.0               15.1 +/-    1.09      28.8 +/-    1.09  0.080 / 0.220
G07     107.9          58.1               15.2 +/-    0.84      17.6 +/-    0.84  0.200 / 0.290
G08     42.1           21.8               10.7 +/-    2.99      22.5 +/-    2.99  0.030 / 0.030
G09     174.8          13.0               15.7 +/-    2.19      41.0 +/-    2.19  0.030 / 0.040
G11     89.1           43.1               16.2 +/-    1.15      22.4 +/-    1.15  0.030 / 0.030
G13     309.1          29.0               13.5 +/-    1.24      24.1 +/-    1.24  0.030 / 0.030
G17     207.1          35.7               17.3 +/-    1.20      27.1 +/-    1.20  0.090 / 0.150
G18     79.9           24.5               15.3 +/-    1.61      30.2 +/-    1.61  0.070 / 0.150
G28     320.0          61.2               12.6 +/-    0.61      14.2 +/-    0.61  0.050 / 0.060
G30     31.9           78.5               14.3 +/-    1.17      14.5 +/-    1.17  0.040 / 0.050