PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-20:12:50
G02     199.9          17.6               18.5 +/-    1.49      43.1 +/-    1.49  0.070 / 0.180
G06     170.9          51.1               16.6 +/-    0.69      20.6 +/-    0.69  0.070 / 0.190
G13     229.8          15.3               17.3 +/-    1.05      42.8 +/-    1.05  0.110 / 0.270
G17     13.5           64.2               13.4 +/-    1.19      14.7 +/-    1.19  0.080 / 0.200
G19     305.2          70.7               15.1 +/-    0.76      15.9 +/-    0.76  0.040 / 0.080
G24     311.9          27.5               13.8 +/-    1.41      25.6 +/-    1.41  0.040 / 0.090
G28     84.3           41.5               15.0 +/-    0.38      21.3 +/-    0.38  0.030 / 0.040
G30     156.6          17.5               16.9 +/-    2.57      39.7 +/-    2.57  0.030 / 0.070