PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-09:58:00
G01     114.2          21.2                7.4 +/-    0.98      15.8 +/-    0.98  0.030 / 0.040
G07     94.9           61.7                7.3 +/-    1.23       8.1 +/-    1.23  0.030 / 0.030
G08     42.9           25.3                4.3 +/-    1.10       8.4 +/-    1.10  0.040 / 0.070
G09     175.1          19.5                7.7 +/-    2.22      17.1 +/-    2.22  0.040 / 0.070
G11     97.9           40.4                8.1 +/-    0.75      11.7 +/-    0.75  0.080 / 0.200
G13     316.0          21.6                1.4 +/-    1.35       3.0 +/-    1.35  0.070 / 0.160
G17     202.5          32.3                8.1 +/-    2.08      13.6 +/-    2.08  0.050 / 0.090
G28     303.7          59.3                6.3 +/-    1.19       7.2 +/-    1.19  0.080 / 0.120
G30     355.0          72.0                6.3 +/-    1.07       6.6 +/-    1.07  0.090 / 0.140