PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-17:13:00
G01     318.0          20.2                6.7 +/-    2.26      14.6 +/-    2.26  0.260 / 0.220
G08     256.2          11.7                8.4 +/-   14.01      22.6 +/-   14.01  0.170 / 0.210
G10     83.8           52.1               25.0 +/-    1.37      30.8 +/-    1.37  0.240 / 0.280
G11     302.0          23.2                7.3 +/-    1.62      15.0 +/-    1.62  0.230 / 0.500
G14     304.2          70.7                8.4 +/-    0.60       8.8 +/-    0.60  0.130 / 0.250
G18     105.2          25.0               11.0 +/-    2.17      21.5 +/-    2.17  0.250 / 0.300
G22     302.1          12.9                7.3 +/-    2.46      19.0 +/-    2.46  0.080 / 0.050
G25     99.1           9.7                -7.4 +/-   41.28     -20.9 +/-   41.28  0.040 / 0.050
G31     175.7          45.1               11.5 +/-    0.50      15.5 +/-    0.50  0.040 / 0.040
G32     12.9           65.3                8.6 +/-    0.39       9.3 +/-    0.39  0.040 / 0.050