PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-01:27:30
G10     276.3          43.2               13.4 +/-    1.41      18.6 +/-    1.41  0.110 / 0.140
G13     38.8           11.8                9.6 +/-    2.52      25.8 +/-    2.52  0.090 / 0.140
G15     53.2           44.4               10.0 +/-    0.82      13.6 +/-    0.82  0.050 / 0.030
G20     289.6          51.5               17.0 +/-    0.63      21.0 +/-    0.63  0.050 / 0.040
G21     24.5           76.0               10.9 +/-    0.97      11.2 +/-    0.97  0.130 / 0.140
G24     112.1          18.9               12.8 +/-    1.05      28.9 +/-    1.05  0.090 / 0.180
G27     314.2          24.9                9.9 +/-    2.00      19.3 +/-    2.00  0.470 / 0.400
G29     168.9          23.7               12.7 +/-    0.96      25.5 +/-    0.96  0.480 / 0.490
G32     205.2          18.3               15.8 +/-    2.32      36.3 +/-    2.32  0.040 / 0.050