PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-17:27:50
G01     40.0           15.0                8.5 +/-    2.80      21.3 +/-    2.80  0.040 / 0.050
G06     174.5          39.5               13.0 +/-    0.98      19.0 +/-    0.98  0.040 / 0.070
G13     235.7          21.8               13.4 +/-    1.60      28.1 +/-    1.60  0.290 / 0.190
G15     269.4          11.9               12.0 +/-    1.92      32.0 +/-    1.92  0.150 / 0.330
G17     359.2          70.9               11.1 +/-    0.97      11.6 +/-    0.97  0.120 / 0.400
G19     281.7          70.4               10.2 +/-    0.87      10.8 +/-    0.87  0.100 / 0.380
G24     316.0          19.9                8.1 +/-    2.21      17.8 +/-    2.21  0.030 / 0.030
G28     67.1           50.5               11.5 +/-    1.02      14.4 +/-    1.02  0.030 / 0.030
G30     154.1          24.2               12.8 +/-    3.49      25.5 +/-    3.49  0.040 / 0.040