PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-21:28:00
G02     203.1          35.1               14.8 +/-    0.92      23.4 +/-    0.92  0.100 / 0.240
G06     157.1          69.8               12.5 +/-    0.45      13.3 +/-    0.45  0.280 / 0.220
G12     307.9          16.1                9.6 +/-    2.70      23.3 +/-    2.70  0.090 / 0.110
G17     33.2           51.5               10.8 +/-    1.18      13.4 +/-    1.18  0.080 / 0.050
G19     357.3          65.9               10.0 +/-    0.49      10.8 +/-    0.49  0.030 / 0.020
G24     297.6          38.3                9.3 +/-    1.76      13.9 +/-    1.76  0.030 / 0.020
G28     102.7          31.0               11.0 +/-    0.96      18.8 +/-    0.96  0.070 / 0.090