PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-15:57:30
G03     187.5          19.3               12.5 +/-    1.35      28.0 +/-    1.35  0.120 / 0.300
G07     292.9          41.9               12.1 +/-    1.18      17.0 +/-    1.18  0.120 / 0.240
G08     141.8          26.9               11.6 +/-    1.04      21.7 +/-    1.04  0.040 / 0.080
G09     320.4          60.0               11.8 +/-    0.67      13.5 +/-    0.67  0.060 / 0.080
G16     44.4           43.7                9.7 +/-    0.54      13.3 +/-    0.54  0.170 / 0.290
G23     106.8          80.7               10.9 +/-    1.12      11.1 +/-    1.12  0.140 / 0.270
G26     43.7           15.1                9.9 +/-    1.36      24.6 +/-    1.36  0.050 / 0.090
G27     103.6          32.9               12.2 +/-    0.78      20.2 +/-    0.78  0.060 / 0.080
G30     273.2          13.1               11.5 +/-    2.67      29.9 +/-    2.67  0.050 / 0.090