PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-09:12:30
G02     44.7           45.1                4.0 +/-    1.78       5.3 +/-    1.78  0.030 / 0.020
G05     109.8          68.7                6.6 +/-    0.67       7.0 +/-    0.67  0.030 / 0.030
G06     59.2           11.0                3.5 +/-    2.29       9.6 +/-    2.29  0.040 / 0.040
G12     193.1          56.7                6.3 +/-    0.36       7.4 +/-    0.36  0.030 / 0.040
G20     202.3          33.6                6.3 +/-    1.37      10.3 +/-    1.37  0.090 / 0.110
G25     277.8          57.8               11.5 +/-    1.33      13.3 +/-    1.33  0.080 / 0.100
G29     316.2          38.5                3.0 +/-    1.15       4.5 +/-    1.15  0.040 / 0.040