PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-13:57:50
G01     51.3           26.0                6.9 +/-    2.60      13.2 +/-    2.60  0.090 / 0.200
G06     178.5          23.3                9.4 +/-    3.31      19.1 +/-    3.31  0.080 / 0.250
G07     145.4          11.4                7.1 +/-    2.10      19.2 +/-    2.10  0.040 / 0.050
G11     44.5           14.1                5.4 +/-    2.13      13.8 +/-    2.13  0.040 / 0.040
G13     254.6          31.1                6.9 +/-    2.15      11.8 +/-    2.15  0.130 / 0.180
G15     287.2          15.7                6.1 +/-    2.03      14.9 +/-    2.03  0.110 / 0.200
G17     321.0          79.2                6.5 +/-    0.48       6.6 +/-    0.48  0.220 / 0.110
G19     245.8          60.9                7.7 +/-    0.95       8.7 +/-    0.95  0.120 / 0.090
G28     50.7           53.2                7.4 +/-    0.82       8.9 +/-    0.82  0.020 / 0.020
G30     149.0          44.7                9.0 +/-    0.43      12.1 +/-    0.43  0.020 / 0.020