PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-20:27:50
G01     64.7           31.6               10.7 +/-    0.68      18.1 +/-    0.68  0.040 / 0.050
G07     139.4          20.6               14.7 +/-    1.27      31.8 +/-    1.27  0.040 / 0.060
G11     49.7           26.6                9.2 +/-    1.81      17.4 +/-    1.81  0.070 / 0.130
G13     267.4          37.4               12.4 +/-    1.39      18.8 +/-    1.39  0.090 / 0.170
G15     297.4          16.3                9.6 +/-    1.43      23.2 +/-    1.43  0.040 / 0.050
G17     243.5          74.0               13.6 +/-    0.44      14.0 +/-    0.44  0.050 / 0.040
G18     43.8           14.2                7.8 +/-    1.51      19.8 +/-    1.51  0.050 / 0.080
G19     227.4          46.8               14.0 +/-    1.12      18.4 +/-    1.12  0.070 / 0.110
G28     19.7           59.8               11.6 +/-    0.73      13.2 +/-    0.73  0.100 / 0.280
G30     140.0          55.3               12.9 +/-    1.03      15.4 +/-    1.03  0.090 / 0.230