PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-08:43:10
G01     249.4          34.5               -0.7 +/-    9.04      -1.0 +/-    9.04  0.060 / 0.120
G03     315.7          45.2               -0.2 +/-    7.27      -0.3 +/-    7.27  0.090 / 0.130
G11     236.1          11.4               -0.4 +/-   10.36      -1.2 +/-   10.36  0.030 / 0.040
G14     59.4           42.5               -3.3 +/-    8.98      -4.6 +/-    8.98  0.040 / 0.040
G18     220.0          26.4                1.4 +/-   10.06       2.6 +/-   10.06  0.050 / 0.100
G22     300.7          69.4               -2.6 +/-    8.36      -2.7 +/-    8.36  0.060 / 0.090
G23     288.8          22.1               -0.5 +/-    7.91      -1.0 +/-    7.91  0.040 / 0.090
G26     132.1          40.0                0.4 +/-    8.84       0.6 +/-    8.84  0.050 / 0.080
G31     41.2           54.4               -3.3 +/-    8.27      -3.9 +/-    8.27  0.070 / 0.240
G32     79.5           20.4               -1.1 +/-    8.75      -2.4 +/-    8.75  0.090 / 0.200