PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-15:57:50
G03     187.5          19.3               10.7 +/-    1.24      23.9 +/-    1.24  0.160 / 0.180
G07     292.9          41.9               12.8 +/-    2.59      18.0 +/-    2.59  0.110 / 0.120
G08     141.8          26.9               12.4 +/-    1.97      23.2 +/-    1.97  0.070 / 0.090
G09     320.4          60.0               11.4 +/-    1.28      13.0 +/-    1.28  0.080 / 0.110
G16     44.4           43.7               11.5 +/-    0.70      15.8 +/-    0.70  0.040 / 0.040
G23     106.8          80.7               10.3 +/-    0.67      10.4 +/-    0.67  0.040 / 0.040
G26     43.7           15.1                9.4 +/-    3.02      23.3 +/-    3.02  0.130 / 0.220
G27     103.6          32.9               11.5 +/-    1.32      19.0 +/-    1.32  0.280 / 0.400
G30     273.2          13.1               11.3 +/-    3.90      29.5 +/-    3.90  0.110 / 0.290