PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-19:27:40
G01     88.1           32.3               17.8 +/-   35.26      29.8 +/-   35.26  0.140 / 0.450
G07     127.1          44.4               21.9 +/-   35.84      29.7 +/-   35.84  0.120 / 0.520
G11     67.7           39.7               16.4 +/-   34.34      24.0 +/-   34.34  0.040 / 0.060
G13     292.7          36.4               18.1 +/-   33.53      27.9 +/-   33.53  0.050 / 0.060
G15     314.4          10.5               -1.9 +/-   28.55      -5.2 +/-   28.55  0.070 / 0.100
G17     216.5          51.8               22.5 +/-   35.76      27.8 +/-   35.76  0.070 / 0.110
G18     62.4           23.7               13.5 +/-   34.29      27.2 +/-   34.29  0.060 / 0.080
G19     215.6          27.5               22.0 +/-   33.48      40.8 +/-   33.48  0.070 / 0.090
G28     353.3          61.6               17.2 +/-   32.99      19.2 +/-   32.99  0.030 / 0.070
G30     111.2          73.7               20.5 +/-   34.12      21.3 +/-   34.12  0.040 / 0.070