PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-17:28:00
G01     247.4          33.3               10.0 +/-    1.26      16.3 +/-    1.26  0.040 / 0.040
G03     314.7          50.5                7.4 +/-    1.03       9.3 +/-    1.03  0.050 / 0.040
G11     237.2          11.0               11.0 +/-    2.24      30.1 +/-    2.24  0.040 / 0.080
G14     62.7           40.1                6.6 +/-    1.07       9.7 +/-    1.07  0.040 / 0.090
G16     161.8          21.3                3.9 +/-   18.46       8.3 +/-   18.46  0.150 / 0.300
G22     297.4          70.8                8.2 +/-    0.52       8.6 +/-    0.52  0.110 / 0.240
G23     290.0          22.8                9.1 +/-    2.16      18.6 +/-    2.16  0.040 / 0.030
G31     40.5           54.1                6.0 +/-    0.54       7.3 +/-    0.54  0.050 / 0.040
G32     80.7           20.1                7.7 +/-    1.07      16.9 +/-    1.07  0.060 / 0.050