PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-23:42:50
G02     202.2          34.0               14.7 +/-    1.40      23.8 +/-    1.40  0.040 / 0.030
G06     161.9          67.3               12.5 +/-    0.56      13.4 +/-    0.56  0.040 / 0.040
G12     306.6          13.7                8.4 +/-    2.56      21.7 +/-    2.56  0.190 / 0.210
G17     29.0           54.5                8.1 +/-    1.22       9.7 +/-    1.22  0.070 / 0.220
G19     355.1          66.6                9.7 +/-    0.45      10.5 +/-    0.45  0.040 / 0.020
G24     300.0          37.1               10.0 +/-    2.60      15.4 +/-    2.60  0.030 / 0.020
G28     101.0          32.0               10.9 +/-    1.13      18.3 +/-    1.13  0.050 / 0.080