PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-19:28:00
G03     227.7          67.0                9.1 +/-    0.35       9.8 +/-    0.35  0.040 / 0.050
G09     303.8          18.0                9.3 +/-    1.95      21.4 +/-    1.95  0.050 / 0.040
G14     100.4          14.8                9.6 +/-    2.15      24.1 +/-    2.15  0.030 / 0.040
G16     126.2          59.9               10.4 +/-    0.50      11.8 +/-    0.50  0.030 / 0.040
G22     192.6          53.5                9.5 +/-    0.41      11.5 +/-    0.41  0.150 / 0.400
G23     321.2          51.1                9.3 +/-    0.55      11.6 +/-    0.55  0.100 / 0.360
G26     66.9           50.8                8.4 +/-    1.06      10.5 +/-    1.06  0.270 / 0.270
G31     53.0           18.3                7.0 +/-    3.90      16.0 +/-    3.90  0.250 / 0.260