PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-11:12:40
G02     37.4           51.9                3.4 +/-    0.99       4.2 +/-    0.99  0.030 / 0.020
G05     134.7          64.1                5.1 +/-    0.54       5.6 +/-    0.54  0.020 / 0.020
G06     53.7           18.9                1.6 +/-    3.19       3.7 +/-    3.19  0.150 / 0.200
G12     200.2          66.1                3.5 +/-    0.45       3.8 +/-    0.45  0.110 / 0.170
G20     200.0          26.3                2.4 +/-    1.74       4.5 +/-    1.74  0.030 / 0.030
G25     292.9          55.0                1.7 +/-    2.25       2.0 +/-    2.25  0.030 / 0.030
G29     311.0          33.1                1.2 +/-    1.57       2.0 +/-    1.57  0.370 / 0.220