PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-07:28:10
G02     214.3          57.7                6.3 +/-    1.43       7.4 +/-    1.43  0.050 / 0.070
G06     70.1           78.4                4.1 +/-    0.55       4.1 +/-    0.55  0.050 / 0.080
G12     317.3          33.0                4.1 +/-    1.06       6.8 +/-    1.06  0.140 / 0.410
G17     56.9           31.4                3.7 +/-    0.43       6.3 +/-    0.43  0.180 / 0.340
G19     33.9           52.2                3.3 +/-    0.42       4.1 +/-    0.42  0.030 / 0.030
G24     262.8          43.0                3.8 +/-    1.08       5.3 +/-    1.08  0.030 / 0.020
G28     120.3          17.4                7.8 +/-    2.27      18.3 +/-    2.27  0.050 / 0.080