PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-16:57:30
G01     220.7          11.3               13.4 +/-    1.17      36.4 +/-    1.17  0.110 / 0.270
G03     247.5          71.5               14.0 +/-    0.78      14.7 +/-    0.78  0.160 / 0.280
G09     298.7          12.0                7.4 +/-   17.27      19.7 +/-   17.27  0.080 / 0.110
G14     92.9           21.1               10.7 +/-    1.74      23.0 +/-    1.74  0.180 / 0.130
G16     137.6          53.2               14.7 +/-    0.65      17.8 +/-    0.65  0.050 / 0.050
G22     196.4          61.3               14.3 +/-    0.87      16.1 +/-    0.87  0.030 / 0.040
G23     315.5          45.7               12.1 +/-    0.56      16.2 +/-    0.56  0.040 / 0.050
G31     49.1           24.1               10.0 +/-    1.99      19.9 +/-    1.99  0.040 / 0.050