PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-19:43:00
G01     94.1           30.3               14.6 +/-    0.84      25.4 +/-    0.84  0.040 / 0.060
G07     123.0          42.6               15.8 +/-    0.92      22.0 +/-    0.92  0.040 / 0.070
G08     41.9           10.1               10.8 +/-    3.60      30.1 +/-    3.60  0.050 / 0.040
G11     71.6           41.0               13.8 +/-    1.55      19.7 +/-    1.55  0.040 / 0.050
G13     298.3          35.5               13.2 +/-    1.28      20.8 +/-    1.28  0.030 / 0.030
G17     210.8          50.3               17.0 +/-    0.39      21.4 +/-    0.39  0.030 / 0.030
G18     65.5           23.5               12.0 +/-    1.96      24.3 +/-    1.96  0.080 / 0.130
G19     212.3          23.8               17.3 +/-    1.93      34.7 +/-    1.93  0.090 / 0.120
G28     331.7          61.3               13.0 +/-    0.72      14.6 +/-    0.72  0.160 / 0.250
G30     93.7           77.1               14.7 +/-    0.53      15.0 +/-    0.53  0.140 / 0.230