PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-13:12:30
G07     39.6           68.4               28.8 +/-    4.54      30.8 +/-    4.54  0.110 / 0.180
G08     55.9           43.2              -15.1 +/-    4.93     -20.9 +/-    4.93  0.170 / 0.220
G09     177.2          42.5              -11.7 +/-    5.21     -16.3 +/-    5.21  0.120 / 0.210
G11     122.6          29.9               20.8 +/-    4.53      36.5 +/-    4.53  0.030 / 0.040
G17     198.6          10.1               -9.2 +/-    7.04     -25.7 +/-    7.04  0.030 / 0.040
G23     160.9          16.0               21.0 +/-    7.45      50.8 +/-    7.45  0.040 / 0.050
G27     38.5           12.2                4.3 +/-    1.63      11.4 +/-    1.63  0.040 / 0.050
G28     265.8          48.7              -88.9 +/-   22.31    -114.0 +/-   22.31  0.110 / 0.170
G30     322.9          52.3              -23.0 +/-    6.90     -28.2 +/-    6.90  0.150 / 0.170