PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-18:27:50
G01     92.5           30.7               13.2 +/-    1.05      22.7 +/-    1.05  0.030 / 0.030
G07     124.2          41.3               12.9 +/-    0.64      18.3 +/-    0.64  0.030 / 0.030
G11     70.2           40.7               11.2 +/-    1.25      16.1 +/-    1.25  0.040 / 0.060
G13     296.8          36.1               12.8 +/-    2.34      19.9 +/-    2.34  0.040 / 0.060
G17     211.7          51.0               12.8 +/-    0.51      15.9 +/-    0.51  0.040 / 0.050
G18     64.5           23.5               10.5 +/-    2.00      21.3 +/-    2.00  0.050 / 0.050
G19     212.8          25.2               12.5 +/-    1.73      24.4 +/-    1.73  0.110 / 0.140
G28     333.5          61.4               10.7 +/-    0.53      12.0 +/-    0.53  0.080 / 0.140
G30     100.5          75.6               12.6 +/-    0.55      13.0 +/-    0.55  0.110 / 0.140