PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-12:28:10
G01     44.2           20.1                4.8 +/-    3.57      10.6 +/-    3.57  0.100 / 0.240
G06     177.2          32.3                9.5 +/-    2.07      15.8 +/-    2.07  0.090 / 0.190
G13     244.6          25.6                7.1 +/-    1.83      13.7 +/-    1.83  0.070 / 0.100
G15     277.0          14.1                5.3 +/-    1.36      13.6 +/-    1.36  0.110 / 0.080
G17     356.4          73.2                6.2 +/-    0.76       6.4 +/-    0.76  0.150 / 0.240
G19     266.1          67.8                6.9 +/-    1.18       7.4 +/-    1.18  0.160 / 0.200
G24     318.6          13.3                1.0 +/-   14.41       2.6 +/-   14.41  0.030 / 0.030
G28     64.9           49.1                6.6 +/-    1.32       8.4 +/-    1.32  0.030 / 0.020
G30     153.0          34.1                6.4 +/-    0.82      10.3 +/-    0.82  0.080 / 0.250