PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-17:13:10
G08     282.3          23.4                9.0 +/-    1.26      18.3 +/-    1.26  0.070 / 0.140
G10     27.6           62.5                8.5 +/-    0.68       9.5 +/-    0.68  0.060 / 0.160
G14     238.5          54.5               10.4 +/-    1.26      12.4 +/-    1.26  0.070 / 0.070
G18     317.0          20.2                8.1 +/-    1.16      17.8 +/-    1.16  0.060 / 0.060
G20     76.8           47.3                9.1 +/-    0.64      11.9 +/-    0.64  0.030 / 0.030
G21     149.6          28.6               10.2 +/-    1.03      18.3 +/-    1.03  0.030 / 0.030
G24     46.4           18.0                8.3 +/-    0.88      19.1 +/-    0.88  0.080 / 0.140
G27     248.7          27.3                8.5 +/-    1.89      15.9 +/-    1.89  0.080 / 0.120
G31     184.4          10.9               -2.0 +/-   22.42      -5.4 +/-   22.42  0.090 / 0.170
G32     265.9          72.8               10.4 +/-    0.97      10.8 +/-    0.97  0.100 / 0.130