PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-22:27:30
G07     334.8          58.5               10.3 +/-    0.55      11.9 +/-    0.55  0.100 / 0.140
G08     100.0          52.8               12.5 +/-    0.97      15.3 +/-    0.97  0.080 / 0.150
G09     192.6          72.9               12.1 +/-    0.51      12.6 +/-    0.51  0.040 / 0.050
G11     147.1          13.2               13.5 +/-    4.75      35.1 +/-    4.75  0.030 / 0.040
G23     155.5          38.7               11.8 +/-    0.57      17.6 +/-    0.57  0.070 / 0.080
G27     53.0           30.2                9.4 +/-    2.02      16.4 +/-    2.02  0.110 / 0.070
G28     238.9          31.4               13.0 +/-    2.05      22.1 +/-    2.05  0.030 / 0.040
G30     306.0          39.8               10.6 +/-    1.66      15.5 +/-    1.66  0.030 / 0.040