PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-16:57:40
G10     246.9          25.4               11.7 +/-    1.98      22.6 +/-    1.98  0.210 / 0.610
G13     57.0           30.9                8.1 +/-    1.97      13.9 +/-    1.97  0.200 / 0.450
G15     92.7           57.3                9.7 +/-    1.14      11.2 +/-    1.14  0.040 / 0.050
G16     299.3          16.0                7.9 +/-    2.98      19.3 +/-    2.98  0.040 / 0.040
G20     266.0          49.8               11.5 +/-    3.70      14.6 +/-    3.70  0.060 / 0.150
G21     328.9          56.7                8.8 +/-    0.64      10.4 +/-    0.64  0.080 / 0.140
G26     272.4          17.0                9.6 +/-    2.79      22.7 +/-    2.79  0.040 / 0.040
G29     162.3          56.2               10.0 +/-    0.85      11.8 +/-    0.85  0.040 / 0.030