PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-13:43:10
G02     204.2          36.9               11.5 +/-    1.20      17.6 +/-    1.20  0.130 / 0.260
G03     56.3           9.6                 9.2 +/-    1.26      25.9 +/-    1.26  0.130 / 0.330
G06     159.0          71.2               10.8 +/-    0.64      11.3 +/-    0.64  0.080 / 0.080
G12     309.2          17.1                5.3 +/-    3.78      12.4 +/-    3.78  0.140 / 0.080
G17     41.0           45.0                7.6 +/-    1.74      10.2 +/-    1.74  0.300 / 0.260
G19     11.7           62.4                8.3 +/-    1.16       9.3 +/-    1.16  0.170 / 0.180
G24     296.6          38.4                7.8 +/-    1.12      11.6 +/-    1.12  0.060 / 0.060
G28     105.8          28.7               10.7 +/-    1.86      19.3 +/-    1.86  0.060 / 0.040