PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-15:12:30
G01     85.8           32.3                9.3 +/-    1.20      15.6 +/-    1.20  0.030 / 0.080
G07     128.6          39.0                9.1 +/-    1.21      13.5 +/-    1.21  0.040 / 0.070
G11     63.2           35.5                7.6 +/-    0.43      11.9 +/-    0.43  0.080 / 0.120
G13     292.7          35.8                7.6 +/-    1.19      11.8 +/-    1.19  0.070 / 0.120
G17     217.0          59.6               10.1 +/-    0.57      11.5 +/-    0.57  0.070 / 0.110
G19     216.1          32.1                8.9 +/-    1.24      14.9 +/-    1.24  0.080 / 0.090
G28     355.8          61.3                9.0 +/-    1.17      10.1 +/-    1.17  0.020 / 0.040
G30     108.7          75.8               10.2 +/-    0.70      10.5 +/-    0.70  0.030 / 0.030