PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-14:57:30
G02     66.1           26.8                8.3 +/-    1.09      15.6 +/-    1.09  0.030 / 0.040
G05     51.2           56.2                8.9 +/-    0.49      10.5 +/-    0.49  0.020 / 0.050
G12     184.7          26.2               14.8 +/-    0.87      28.2 +/-    0.87  0.090 / 0.200
G13     123.9          20.0               13.6 +/-    1.37      29.9 +/-    1.37  0.120 / 0.190
G15     158.9          18.2               14.6 +/-    1.20      33.7 +/-    1.20  0.050 / 0.140
G20     213.6          66.4               14.9 +/-    0.66      16.1 +/-    0.66  0.040 / 0.110
G21     278.6          25.0                9.3 +/-    0.65      18.1 +/-    0.65  0.040 / 0.050
G25     226.2          46.0               13.1 +/-    1.42      17.4 +/-    1.42  0.040 / 0.050
G29     340.0          66.8                7.8 +/-    0.66       8.4 +/-    0.66  0.080 / 0.240