PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-17:43:00
G01     121.5          16.1               15.0 +/-    1.63      36.3 +/-    1.63  0.170 / 0.260
G07     72.1           68.1               15.8 +/-    0.31      16.9 +/-    0.31  0.160 / 0.240
G08     47.0           36.0               13.0 +/-    1.17      20.3 +/-    1.17  0.030 / 0.030
G09     177.4          28.9               16.1 +/-    1.48      28.8 +/-    1.48  0.040 / 0.030
G11     111.5          38.7               17.0 +/-    0.94      25.3 +/-    0.94  0.070 / 0.070
G13     319.0          17.1               13.8 +/-    2.34      32.7 +/-    2.34  0.060 / 0.080
G17     202.0          19.0               15.3 +/-    2.28      34.5 +/-    2.28  0.110 / 0.210
G18     97.5           19.7               14.4 +/-    0.93      31.9 +/-    0.93  0.110 / 0.180
G28     288.0          56.3               15.3 +/-    1.40      18.0 +/-    1.40  0.050 / 0.100
G30     343.7          66.9               15.0 +/-    0.39      16.2 +/-    0.39  0.050 / 0.080