PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-19:58:00
G03     213.7          60.4               12.6 +/-    1.25      14.3 +/-    1.25  0.040 / 0.050
G07     254.0          12.5                9.9 +/-    2.07      26.2 +/-    2.07  0.060 / 0.060
G09     308.1          24.0                8.7 +/-    1.34      17.3 +/-    1.34  0.070 / 0.140
G16     108.3          64.2               12.1 +/-    0.77      13.3 +/-    0.77  0.070 / 0.130
G22     188.9          45.1               10.9 +/-    0.66      14.7 +/-    0.66  0.030 / 0.040
G23     327.9          57.5                9.9 +/-    0.93      11.5 +/-    0.93  0.030 / 0.040
G26     57.1           46.0                8.3 +/-    0.80      11.0 +/-    0.80  0.210 / 0.260
G31     57.2           12.6                7.3 +/-    1.43      19.1 +/-    1.43  0.210 / 0.210