PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-14:57:30
G01     89.6           31.7                7.6 +/-    0.99      12.8 +/-    0.99  0.030 / 0.050
G07     126.0          41.8                9.0 +/-    0.75      12.7 +/-    0.75  0.040 / 0.060
G11     66.5           37.0                8.9 +/-    0.59      13.6 +/-    0.59  0.070 / 0.120
G13     296.3          34.8                7.3 +/-    3.19      11.6 +/-    3.19  0.090 / 0.140
G17     214.3          56.4               10.2 +/-    0.71      11.9 +/-    0.71  0.020 / 0.020
G19     214.5          29.1               10.4 +/-    1.93      18.6 +/-    1.93  0.020 / 0.020
G28     349.5          61.5                8.9 +/-    0.56      10.0 +/-    0.56  0.040 / 0.040
G30     96.7           78.0                9.3 +/-    0.41       9.5 +/-    0.41  0.040 / 0.040