PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/30-16:13:00
G02     201.0          17.9                8.9 +/-    2.48      20.6 +/-    2.48  0.160 / 0.210
G06     168.6          54.5                6.3 +/-   11.70       7.6 +/-   11.70  0.140 / 0.270
G13     227.6          13.6                7.8 +/-    9.66      20.0 +/-    9.66  0.090 / 0.140
G17     21.6           60.1                6.3 +/-    6.24       7.2 +/-    6.24  0.080 / 0.140
G19     309.0          70.3                6.2 +/-    2.71       6.5 +/-    2.71  0.170 / 0.870
G24     309.8          30.2                7.3 +/-   11.30      12.7 +/-   11.30  0.260 / 1.060
G28     86.8           40.3                5.5 +/-    5.36       7.9 +/-    5.36  0.040 / 0.130
G30     157.5          16.5                6.7 +/-   11.66      16.0 +/-   11.66  0.040 / 0.040