PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-12:43:10
G01     89.2           31.8                5.5 +/-    0.56       9.3 +/-    0.56  0.030 / 0.030
G07     126.3          42.3                6.5 +/-    1.14       9.1 +/-    1.14  0.030 / 0.030
G11     66.6           37.3                3.6 +/-    0.98       5.4 +/-    0.98  0.030 / 0.060
G13     296.1          34.8                4.7 +/-    0.77       7.5 +/-    0.77  0.030 / 0.070
G17     214.6          56.9                6.1 +/-    0.93       7.1 +/-    0.93  0.050 / 0.140
G19     214.7          29.4                5.7 +/-    0.75      10.2 +/-    0.75  0.060 / 0.110
G28     350.9          61.5                3.4 +/-    0.58       3.8 +/-    0.58  0.060 / 0.040
G30     100.3          77.2                4.7 +/-    0.76       4.8 +/-    0.76  0.040 / 0.050