PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-16:13:00
G02     203.4          31.9               11.0 +/-    1.47      18.5 +/-    1.47  0.160 / 0.170
G06     159.5          68.0               10.5 +/-    0.41      11.2 +/-    0.41  0.120 / 0.140
G12     306.0          13.4                8.5 +/-    1.72      22.1 +/-    1.72  0.040 / 0.050
G17     31.5           52.6                9.0 +/-    1.45      11.0 +/-    1.45  0.040 / 0.040
G19     2.0            65.4                8.7 +/-    0.61       9.5 +/-    0.61  0.060 / 0.100
G24     299.3          37.0                8.9 +/-    2.53      13.6 +/-    2.53  0.060 / 0.100
G28     97.9           37.2                9.6 +/-    1.42      14.7 +/-    1.42  0.030 / 0.040