PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-11:27:50
G01     95.0           30.4                4.3 +/-    1.22       7.5 +/-    1.22  0.060 / 0.140
G07     121.6          46.9                4.7 +/-    0.36       6.1 +/-    0.36  0.090 / 0.130
G11     72.6           39.4                3.9 +/-    0.79       5.8 +/-    0.79  0.040 / 0.040
G13     301.3          32.9                1.1 +/-    1.78       1.8 +/-    1.78  0.050 / 0.040
G17     211.1          51.8                5.3 +/-    1.26       6.5 +/-    1.26  0.030 / 0.020
G19     212.6          24.7                5.2 +/-    3.28      10.2 +/-    3.28  0.020 / 0.030
G28     341.3          61.7                3.5 +/-    0.63       3.9 +/-    0.63  0.070 / 0.080
G30     77.9           79.4                4.7 +/-    0.69       4.8 +/-    0.69  0.070 / 0.090