PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-21:43:10
G02     53.3           38.4                9.4 +/-    0.56      14.1 +/-    0.56  0.040 / 0.040
G05     70.3           66.1                9.1 +/-    0.56       9.9 +/-    0.56  0.040 / 0.040
G12     183.5          37.4               13.0 +/-    1.60      19.8 +/-    1.60  0.110 / 0.100
G13     133.1          10.7               -8.2 +/-   16.92     -22.5 +/-   16.92  0.040 / 0.080
G21     265.7          12.3               11.3 +/-    3.14      30.0 +/-    3.14  0.240 / 0.670
G25     247.4          55.9               11.7 +/-    0.72      13.7 +/-    0.72  0.230 / 0.560
G29     323.1          47.0                8.8 +/-    0.88      11.5 +/-    0.88  0.050 / 0.070