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                7.1 +/-    1.19      13.6 +/-    1.19  0.060 / 0.050
G06     178.5          23.3                7.7 +/-    0.79      15.7 +/-    0.79  0.050 / 0.060
G07     145.4          11.4                7.1 +/-    3.07      19.3 +/-    3.07  0.080 / 0.260
G11     44.5           14.1                5.2 +/-    1.42      13.1 +/-    1.42  0.110 / 0.300
G13     254.6          31.1                7.3 +/-    1.07      12.6 +/-    1.07  0.110 / 0.320
G15     287.2          15.7                4.2 +/-    2.44      10.2 +/-    2.44  0.090 / 0.300
G17     321.0          79.2                6.9 +/-    0.44       7.1 +/-    0.44  0.090 / 0.160
G19     245.8          60.9                8.3 +/-    0.84       9.4 +/-    0.84  0.080 / 0.140
G28     50.7           53.2                6.2 +/-    0.56       7.5 +/-    0.56  0.030 / 0.030
G30     149.0          44.7                7.4 +/-    0.61      10.1 +/-    0.61  0.040 / 0.030