PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-17:43:10
G01     245.7          32.3                8.8 +/-    1.21      14.7 +/-    1.21  0.030 / 0.030
G03     314.0          52.0                8.9 +/-    1.03      11.0 +/-    1.03  0.030 / 0.030
G14     64.5           39.0                9.7 +/-    1.42      14.3 +/-    1.42  0.090 / 0.220
G16     161.1          22.8                9.6 +/-    1.26      19.8 +/-    1.26  0.090 / 0.190
G22     293.8          71.9                9.5 +/-    0.57      10.0 +/-    0.57  0.050 / 0.040
G23     291.2          23.7                8.3 +/-    2.36      16.6 +/-    2.36  0.060 / 0.040
G26     130.5          42.3               10.5 +/-    0.66      14.7 +/-    0.66  0.040 / 0.110
G31     40.4           52.5                8.2 +/-    0.78      10.1 +/-    0.78  0.060 / 0.080
G32     82.0           19.1                9.3 +/-    1.65      20.9 +/-    1.65  0.050 / 0.040