PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-13:28:00
G03     210.2          56.4                8.7 +/-    0.64      10.3 +/-    0.64  0.060 / 0.260
G07     257.7          15.5                6.0 +/-    1.60      14.8 +/-    1.60  0.080 / 0.230
G09     310.9          29.0                5.7 +/-    1.37      10.3 +/-    1.37  0.080 / 0.100
G16     88.7           63.7                8.5 +/-    0.69       9.3 +/-    0.69  0.070 / 0.100
G22     184.8          37.7                8.3 +/-    2.67      12.6 +/-    2.67  0.040 / 0.060
G23     337.0          64.4                7.6 +/-    0.41       8.3 +/-    0.41  0.040 / 0.050
G26     51.6           40.6                7.6 +/-    1.09      10.9 +/-    1.09  0.030 / 0.040
G27     133.1          11.5                7.0 +/-   12.81      18.8 +/-   12.81  0.030 / 0.050