PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-15:27:40
G01     87.3           32.4                9.4 +/-    1.29      15.8 +/-    1.29  0.090 / 0.090
G07     127.7          43.5               11.9 +/-    0.67      16.5 +/-    0.67  0.050 / 0.100
G11     65.6           38.5               10.0 +/-    1.90      14.9 +/-    1.90  0.020 / 0.020
G13     291.6          36.8               11.6 +/-    2.63      17.9 +/-    2.63  0.020 / 0.030
G17     216.5          55.5               12.7 +/-    0.97      15.0 +/-    0.97  0.040 / 0.050
G18     61.1           23.2                8.9 +/-    1.41      18.1 +/-    1.41  0.040 / 0.050
G19     216.0          26.7               12.4 +/-    2.28      23.2 +/-    2.28  0.080 / 0.090
G28     353.8          61.6                9.3 +/-    0.54      10.4 +/-    0.54  0.070 / 0.090
G30     110.8          74.9               11.3 +/-    1.15      11.6 +/-    1.15  0.080 / 0.160