PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-21:57:50
G01     41.2           16.7                9.9 +/-    3.10      23.5 +/-    3.10  0.120 / 0.170
G06     177.2          35.3               15.5 +/-    2.08      24.5 +/-    2.08  0.190 / 0.310
G13     237.6          23.1               16.0 +/-    2.47      32.6 +/-    2.47  0.080 / 0.250
G15     270.9          12.6               12.8 +/-    2.64      33.6 +/-    2.64  0.080 / 0.230
G17     2.1            70.8               12.3 +/-    0.52      13.0 +/-    0.52  0.030 / 0.030
G19     273.9          68.8               13.0 +/-    0.94      13.8 +/-    0.94  0.030 / 0.040
G24     316.3          19.5                8.5 +/-    2.75      18.9 +/-    2.75  0.040 / 0.060
G28     65.7           50.5               11.0 +/-    0.79      13.8 +/-    0.79  0.040 / 0.050
G30     153.9          27.2               14.2 +/-    1.78      26.5 +/-    1.78  0.060 / 0.130