PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-17:28:00
G01     40.0           15.0                8.6 +/-    1.06      21.5 +/-    1.06  0.130 / 0.300
G06     174.5          39.5               14.6 +/-    1.10      21.4 +/-    1.10  0.140 / 0.340
G13     235.7          21.8               15.0 +/-    2.68      31.6 +/-    2.68  0.040 / 0.090
G15     269.4          11.9               12.2 +/-    1.51      32.7 +/-    1.51  0.040 / 0.080
G17     359.2          70.9               11.7 +/-    0.61      12.3 +/-    0.61  0.100 / 0.340
G19     281.7          70.4               11.7 +/-    0.66      12.3 +/-    0.66  0.120 / 0.270
G24     316.0          19.9               10.6 +/-    1.99      23.5 +/-    1.99  0.030 / 0.030
G28     67.1           50.5               11.0 +/-    0.91      13.8 +/-    0.91  0.040 / 0.040
G30     154.1          24.2               13.4 +/-    1.91      26.8 +/-    1.91  0.040 / 0.050