PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-15:58:00
G10     263.0          35.1                9.5 +/-    0.95      15.1 +/-    0.95  0.100 / 0.120
G13     44.3           22.2                6.2 +/-    1.09      12.9 +/-    1.09  0.100 / 0.130
G15     62.3           50.1               10.2 +/-    0.56      12.9 +/-    0.56  0.040 / 0.040
G16     286.9          12.2                8.9 +/-    2.21      23.7 +/-    2.21  0.040 / 0.040
G18     296.5          64.3                8.9 +/-    0.69       9.7 +/-    0.69  0.050 / 0.090
G20     50.5           40.1                6.9 +/-    0.43      10.0 +/-    0.43  0.050 / 0.080
G21     10.5           71.9                8.9 +/-    0.66       9.3 +/-    0.66  0.100 / 0.300
G24     124.4          11.7               -6.8 +/-   41.17     -18.4 +/-   41.17  0.080 / 0.300
G27     319.5          17.1                5.7 +/-    1.10      13.5 +/-    1.10  0.080 / 0.240
G29     165.6          31.0               10.8 +/-    1.70      18.5 +/-    1.70  0.070 / 0.270