PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/19-13:43:10
G02     42.8           47.0                4.4 +/-    0.73       5.7 +/-    0.73  0.030 / 0.020
G05     120.6          68.4                7.1 +/-    0.44       7.6 +/-    0.44  0.020 / 0.030
G06     58.3           12.3                4.3 +/-    2.06      11.5 +/-    2.06  0.110 / 0.110
G12     193.7          58.0                7.1 +/-    0.30       8.2 +/-    0.30  0.090 / 0.100
G20     200.7          34.7                7.9 +/-    1.40      12.6 +/-    1.40  0.030 / 0.030
G25     278.4          58.3                7.1 +/-    1.62       8.2 +/-    1.62  0.030 / 0.020
G29     317.0          40.2                3.3 +/-    1.33       4.8 +/-    1.33  0.050 / 0.040