PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-20:58:00
G01     42.9           18.9                8.9 +/-    3.94      20.1 +/-    3.94  0.030 / 0.050
G06     177.2          32.6               13.4 +/-    1.98      22.3 +/-    1.98  0.040 / 0.060
G13     240.2          25.1               11.9 +/-    2.22      23.2 +/-    2.22  0.170 / 0.290
G15     273.7          13.6                9.4 +/-    1.48      24.2 +/-    1.48  0.240 / 0.390
G17     353.9          73.4               10.9 +/-    0.90      11.3 +/-    0.90  0.070 / 0.170
G19     265.9          67.3               11.6 +/-    0.87      12.5 +/-    0.87  0.070 / 0.120
G24     317.2          16.7               10.0 +/-    2.45      23.7 +/-    2.45  0.090 / 0.270
G28     61.0           52.0               10.0 +/-    0.65      12.3 +/-    0.65  0.090 / 0.280
G30     152.9          29.8               13.9 +/-    1.08      24.4 +/-    1.08  0.070 / 0.090