PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-11:28:00
G02     47.4           42.7                5.5 +/-    1.09       7.7 +/-    1.09  0.030 / 0.030
G05     100.6          69.5                6.3 +/-    0.99       6.6 +/-    0.99  0.020 / 0.020
G06     60.9           10.0                5.1 +/-    3.20      14.3 +/-    3.20  0.040 / 0.030
G12     191.4          52.6               10.3 +/-    0.52      12.6 +/-    0.52  0.030 / 0.040
G20     202.6          38.6                6.7 +/-    1.16       9.9 +/-    1.16  0.070 / 0.100
G21     259.6          10.9               -5.4 +/-    8.43     -14.7 +/-    8.43  0.090 / 0.090
G25     269.2          58.4                7.6 +/-    1.24       8.8 +/-    1.24  0.040 / 0.030
G29     319.5          42.7                3.8 +/-    0.67       5.4 +/-    0.67  0.030 / 0.030