PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/10-12:28:00
G02     46.7           43.3                4.3 +/-    1.34       6.0 +/-    1.34  0.030 / 0.020
G05     104.2          69.6                5.3 +/-    0.68       5.6 +/-    0.68  0.030 / 0.020
G06     60.6           10.3                2.7 +/-    1.92       7.6 +/-    1.92  0.070 / 0.090
G12     191.6          53.2               10.4 +/-    0.64      12.6 +/-    0.64  0.090 / 0.090
G20     202.2          38.5                8.8 +/-    0.72      13.1 +/-    0.72  0.030 / 0.040
G21     259.2          10.8               -5.4 +/-    6.31     -14.8 +/-    6.31  0.030 / 0.030
G25     269.9          58.5                3.0 +/-    3.41       3.5 +/-    3.41  0.350 / 0.360
G29     319.5          42.9                3.9 +/-    0.68       5.4 +/-    0.68  0.170 / 0.310