PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-16:42:30
G07     349.1          63.1               11.9 +/-    0.55      13.1 +/-    0.55  0.030 / 0.040
G08     84.3           53.6               12.2 +/-    1.08      14.8 +/-    1.08  0.040 / 0.050
G09     183.1          62.5               12.8 +/-    0.54      14.3 +/-    0.54  0.040 / 0.040
G11     139.7          19.6               12.6 +/-    2.64      28.1 +/-    2.64  0.040 / 0.040
G23     156.9          26.8               12.0 +/-    1.30      22.4 +/-    1.30  0.080 / 0.060
G27     46.5           25.3               10.4 +/-    1.98      20.2 +/-    1.98  0.090 / 0.070
G28     246.6          37.7               15.2 +/-    1.45      23.0 +/-    1.45  0.070 / 0.090
G30     310.9          42.8               10.5 +/-    0.97      14.6 +/-    0.97  0.090 / 0.100