PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-15:42:50
G01     105.0          26.6               12.0 +/-    1.73      22.6 +/-    1.73  0.080 / 0.090
G07     109.9          56.9               12.3 +/-    0.30      14.4 +/-    0.30  0.150 / 0.210
G08     41.8           18.9               10.0 +/-    1.84      22.7 +/-    1.84  0.020 / 0.020
G09     173.8          11.0               12.5 +/-    2.81      34.2 +/-    2.81  0.030 / 0.020
G11     86.0           42.8               10.9 +/-    1.11      15.2 +/-    1.11  0.030 / 0.030
G13     307.9          29.9               10.2 +/-    1.47      17.9 +/-    1.47  0.030 / 0.040
G17     207.0          38.9               12.3 +/-    1.04      18.3 +/-    1.04  0.080 / 0.070
G18     78.1           24.5               13.5 +/-    0.97      26.6 +/-    0.97  0.080 / 0.080
G28     322.0          61.3                9.4 +/-    1.06      10.5 +/-    1.06  0.300 / 0.440
G30     31.9           79.0               12.0 +/-    0.68      12.2 +/-    0.68  0.250 / 0.430