PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-23:57:40
G02     199.8          22.4               15.0 +/-    1.99      31.1 +/-    1.99  0.200 / 0.230
G06     171.0          54.2               13.1 +/-    0.69      15.8 +/-    0.69  0.300 / 0.240
G13     227.4          12.9               14.6 +/-    2.84      38.2 +/-    2.84  0.080 / 0.120
G17     15.5           62.7               10.8 +/-    0.86      12.0 +/-    0.86  0.090 / 0.100
G19     321.9          70.9               11.0 +/-    0.49      11.5 +/-    0.49  0.050 / 0.040
G24     310.0          29.6               10.9 +/-    1.25      19.2 +/-    1.25  0.050 / 0.040
G28     88.7           39.2               10.9 +/-    1.04      16.1 +/-    1.04  0.050 / 0.090
G30     156.5          12.5               15.1 +/-    0.79      40.0 +/-    0.79  0.060 / 0.090