PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-19:42:40
G01     116.8          18.9               14.7 +/-    1.68      33.3 +/-    1.68  0.030 / 0.040
G07     93.3           60.4               13.5 +/-    0.76      15.3 +/-    0.76  0.030 / 0.050
G08     43.8           28.7               10.5 +/-    1.96      18.9 +/-    1.96  0.070 / 0.070
G09     177.2          25.1               14.5 +/-    2.54      28.4 +/-    2.54  0.040 / 0.060
G11     102.1          41.2               14.9 +/-    0.88      21.2 +/-    0.88  0.100 / 0.160
G13     316.3          21.8               10.8 +/-    2.74      22.8 +/-    2.74  0.110 / 0.110
G17     201.3          27.5               15.9 +/-    1.50      29.4 +/-    1.50  0.100 / 0.220
G18     89.4           21.3               14.0 +/-    1.90      29.9 +/-    1.90  0.130 / 0.200
G28     289.9          55.5               14.4 +/-    2.00      17.0 +/-    2.00  0.030 / 0.030
G30     353.3          71.3               13.4 +/-    0.73      14.1 +/-    0.73  0.030 / 0.030