PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/25-16:12:50
G01     60.8           30.4                9.1 +/-    0.67      15.8 +/-    0.67  0.070 / 0.220
G07     141.0          19.3               11.6 +/-    1.16      25.9 +/-    1.16  0.080 / 0.270
G11     48.4           24.9                7.8 +/-    0.68      15.3 +/-    0.68  0.040 / 0.070
G13     263.0          36.5               12.5 +/-    1.14      19.2 +/-    1.14  0.040 / 0.050
G15     294.6          16.4                6.7 +/-    1.12      16.2 +/-    1.12  0.070 / 0.190
G17     249.1          73.8               12.0 +/-    0.59      12.5 +/-    0.59  0.070 / 0.220
G18     42.2           12.9                7.8 +/-    0.94      20.3 +/-    0.94  0.050 / 0.100
G19     230.5          50.6               14.2 +/-    0.68      17.7 +/-    0.68  0.070 / 0.110
G28     23.4           59.6                9.9 +/-    0.63      11.3 +/-    0.63  0.030 / 0.030
G30     142.4          51.2               10.7 +/-    0.62      13.3 +/-    0.62  0.020 / 0.040