PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-20:42:40
G01     40.5           15.4               11.8 +/-    1.47      29.1 +/-    1.47  0.120 / 0.270
G06     173.8          41.5               17.9 +/-    0.73      25.5 +/-    0.73  0.150 / 0.280
G13     236.6          21.1               19.5 +/-    1.39      41.8 +/-    1.39  0.140 / 0.360
G15     270.2          11.7               16.8 +/-    4.05      45.1 +/-    4.05  0.110 / 0.260
G17     356.2          71.1               15.5 +/-    0.75      16.3 +/-    0.75  0.040 / 0.080
G19     278.4          68.5               15.6 +/-    0.57      16.6 +/-    0.57  0.050 / 0.080
G24     316.0          20.7               12.7 +/-    2.17      27.5 +/-    2.17  0.060 / 0.140
G28     73.7           46.0               15.5 +/-    1.24      20.6 +/-    1.24  0.060 / 0.180
G30     154.8          25.5               19.6 +/-    2.26      37.8 +/-    2.26  0.050 / 0.070