PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/24-20:43:10
G02     199.9          18.8               21.5 +/-    1.87      48.7 +/-    1.87  0.070 / 0.190
G06     170.6          52.2               16.3 +/-    0.71      20.0 +/-    0.71  0.080 / 0.160
G13     229.0          14.6               17.6 +/-    1.57      44.3 +/-    1.57  0.080 / 0.180
G17     14.4           63.7               12.5 +/-    1.21      13.8 +/-    1.21  0.080 / 0.190
G19     309.4          70.8               14.0 +/-    0.73      14.7 +/-    0.73  0.130 / 0.270
G24     311.3          28.2               12.9 +/-    1.11      23.5 +/-    1.11  0.110 / 0.280
G28     85.6           40.9               13.6 +/-    0.69      19.5 +/-    0.69  0.040 / 0.050
G30     156.7          16.3               17.8 +/-    1.48      42.9 +/-    1.48  0.040 / 0.060