PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-23:27:10
G02     200.7          27.2               16.3 +/-    1.71      30.4 +/-    1.71  0.040 / 0.040
G06     168.0          59.9               13.8 +/-    0.68      15.7 +/-    0.68  0.040 / 0.040
G17     21.1           59.5                8.9 +/-    0.65      10.2 +/-    0.65  0.040 / 0.030
G19     337.0          69.6               10.7 +/-    0.37      11.3 +/-    0.37  0.040 / 0.040
G24     306.3          33.1                9.8 +/-    2.04      16.1 +/-    2.04  0.090 / 0.100
G28     94.1           36.3               12.0 +/-    1.40      18.5 +/-    1.40  0.060 / 0.100