PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-21:12:30
G02     199.9          19.2               19.3 +/-    2.83      43.4 +/-    2.83  0.080 / 0.110
G06     170.7          52.3               17.0 +/-    0.67      20.9 +/-    0.67  0.080 / 0.140
G13     228.9          14.5               20.6 +/-    2.23      51.9 +/-    2.23  0.210 / 0.320
G17     14.0           63.8               14.2 +/-    0.46      15.6 +/-    0.46  0.190 / 0.430
G19     310.5          70.8               14.5 +/-    0.55      15.2 +/-    0.55  0.030 / 0.040
G24     311.3          28.3               11.6 +/-    1.44      21.1 +/-    1.44  0.040 / 0.050
G28     85.8           40.7               14.4 +/-    1.74      20.7 +/-    1.74  0.050 / 0.080
G30     156.7          15.9               17.6 +/-    2.95      42.7 +/-    2.95  0.050 / 0.080