PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-13:42:40
G01     57.6           29.4                5.8 +/-    0.56      10.2 +/-    0.56  0.050 / 0.050
G06     180.0          16.8                9.9 +/-    2.68      23.5 +/-    2.68  0.030 / 0.050
G07     143.0          17.7                7.4 +/-    1.23      17.2 +/-    1.23  0.060 / 0.190
G11     46.7           19.6                5.9 +/-    0.84      13.0 +/-    0.84  0.120 / 0.210
G13     262.4          34.0                6.2 +/-    1.45      10.0 +/-    1.45  0.100 / 0.340
G15     293.7          16.0                4.1 +/-    2.01       9.9 +/-    2.01  0.090 / 0.330
G17     279.9          79.6                6.9 +/-    0.93       7.0 +/-    0.93  0.080 / 0.170
G19     236.0          54.9                6.5 +/-    1.14       7.8 +/-    1.14  0.060 / 0.140
G28     40.0           55.7                6.6 +/-    0.49       7.8 +/-    0.49  0.030 / 0.030
G30     145.0          51.8                7.8 +/-    1.58       9.6 +/-    1.58  0.030 / 0.040