PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-16:58:10
G02     210.9          49.5               15.2 +/-    1.57      19.3 +/-    1.57  0.080 / 0.130
G06     90.9           79.3               13.2 +/-    0.42      13.4 +/-    0.42  0.070 / 0.110
G12     316.2          29.8               10.5 +/-    0.86      18.4 +/-    0.86  0.070 / 0.090
G17     53.1           35.0                9.7 +/-    1.05      15.3 +/-    1.05  0.080 / 0.080
G19     33.1           52.6               11.9 +/-    0.62      14.6 +/-    0.62  0.040 / 0.110
G24     278.5          42.0                9.3 +/-    1.34      13.2 +/-    1.34  0.050 / 0.080
G28     117.7          18.9               13.4 +/-    2.13      30.2 +/-    2.13  0.050 / 0.080