PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-21:27:40
G02     64.2           29.1                8.3 +/-    1.05      14.7 +/-    1.05  0.180 / 0.380
G05     50.7           54.9                7.6 +/-    0.76       9.0 +/-    0.76  0.230 / 0.400
G12     183.8          27.2               10.0 +/-    1.68      18.7 +/-    1.68  0.050 / 0.130
G13     121.4          19.3               11.9 +/-    1.65      26.7 +/-    1.65  0.070 / 0.130
G15     159.8          18.0               11.8 +/-    2.70      27.3 +/-    2.70  0.070 / 0.130
G21     276.8          20.7                8.1 +/-    1.18      17.6 +/-    1.18  0.080 / 0.130
G25     229.0          47.3                5.9 +/-    3.61       7.7 +/-    3.61  0.080 / 0.210
G29     334.3          61.7                8.8 +/-    0.48       9.8 +/-    0.48  0.120 / 0.210