PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-14:58:00
G01     89.6           31.7                7.9 +/-    1.17      13.3 +/-    1.17  0.060 / 0.060
G07     126.0          41.8                9.8 +/-    0.63      13.9 +/-    0.63  0.040 / 0.040
G11     66.5           37.0                7.0 +/-    0.51      10.8 +/-    0.51  0.020 / 0.030
G13     296.3          34.8                8.9 +/-    1.84      14.1 +/-    1.84  0.040 / 0.040
G17     214.3          56.4                9.9 +/-    0.74      11.6 +/-    0.74  0.070 / 0.120
G19     214.5          29.1               10.7 +/-    1.69      19.1 +/-    1.69  0.080 / 0.100
G28     349.5          61.5                7.8 +/-    0.30       8.7 +/-    0.30  0.030 / 0.070
G30     96.7           78.0                8.5 +/-    0.70       8.6 +/-    0.70  0.030 / 0.050