PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-20:27:30
G02     199.8          17.1               20.1 +/-    4.15      47.5 +/-    4.15  0.070 / 0.130
G06     171.2          50.4               16.4 +/-    0.72      20.6 +/-    0.72  0.110 / 0.120
G13     230.3          15.7               16.9 +/-    2.86      41.3 +/-    2.86  0.110 / 0.150
G17     12.2           64.8               12.9 +/-    0.57      14.1 +/-    0.57  0.110 / 0.200
G19     303.4          70.7               12.7 +/-    0.63      13.4 +/-    0.63  0.050 / 0.040
G24     312.3          27.0               11.3 +/-    1.66      21.0 +/-    1.66  0.040 / 0.040
G28     83.6           41.8               12.5 +/-    1.08      17.7 +/-    1.08  0.030 / 0.030
G30     156.5          17.9               19.0 +/-    1.42      44.1 +/-    1.42  0.030 / 0.030