PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-11:43:10
G01     86.3           32.4                3.5 +/-    0.53       5.8 +/-    0.53  0.040 / 0.070
G07     128.3          40.5                4.7 +/-    1.10       6.8 +/-    1.10  0.050 / 0.070
G11     64.2           36.5                3.2 +/-    0.58       4.9 +/-    0.58  0.130 / 0.400
G13     293.2          35.5                4.5 +/-    1.41       7.1 +/-    1.41  0.150 / 0.590
G15     314.4          10.6               -6.8 +/-   15.17     -18.6 +/-   15.17  0.030 / 0.030
G17     216.8          59.3                7.7 +/-    0.80       8.8 +/-    0.80  0.040 / 0.040
G19     216.0          31.7                5.0 +/-    0.91       8.4 +/-    0.91  0.050 / 0.050
G28     356.0          61.3                4.0 +/-    1.06       4.4 +/-    1.06  0.030 / 0.050
G30     109.9          75.1                5.4 +/-    0.67       5.6 +/-    0.67  0.080 / 0.120