PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-19:43:20
G01     93.6           30.5               14.8 +/-    1.75      25.7 +/-    1.75  0.050 / 0.060
G07     123.4          42.2               15.5 +/-    0.89      21.8 +/-    0.89  0.050 / 0.060
G11     71.0           40.8               14.7 +/-    0.63      21.1 +/-    0.63  0.040 / 0.080
G13     297.8          35.7               15.3 +/-    1.25      24.0 +/-    1.25  0.030 / 0.080
G17     211.1          50.8               16.3 +/-    0.81      20.4 +/-    0.81  0.030 / 0.040
G18     65.0           23.5               12.7 +/-    0.88      25.7 +/-    0.88  0.030 / 0.030
G19     212.5          24.2               17.7 +/-    2.64      35.2 +/-    2.64  0.080 / 0.110
G28     332.6          61.4               13.2 +/-    1.16      14.8 +/-    1.16  0.090 / 0.120
G30     95.6           76.9               14.4 +/-    0.63      14.8 +/-    0.63  0.070 / 0.270