PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-17:28:00
G02     201.2          23.9               10.6 +/-    1.40      21.2 +/-    1.40  0.110 / 0.140
G06     168.4          58.1               13.5 +/-    1.27      15.6 +/-    1.27  0.110 / 0.120
G13     223.1          10.6               10.2 +/-    2.10      28.0 +/-    2.10  0.040 / 0.040
G17     23.7           58.2               10.7 +/-    0.63      12.4 +/-    0.63  0.040 / 0.050
G19     339.4          70.0               12.0 +/-    0.39      12.6 +/-    0.39  0.040 / 0.090
G24     306.9          32.2               21.9 +/-    2.02      36.7 +/-    2.02  0.040 / 0.100
G28     88.6           42.0               12.3 +/-    0.98      17.3 +/-    0.98  0.090 / 0.210