PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-23:58:10
G10     262.1          34.3               10.3 +/-    1.34      16.5 +/-    1.34  0.130 / 0.270
G13     45.0           23.2                7.6 +/-    2.51      15.4 +/-    2.51  0.110 / 0.300
G15     66.4           53.3                9.5 +/-    0.55      11.5 +/-    0.55  0.250 / 0.360
G16     285.6          12.7                8.9 +/-    2.47      23.3 +/-    2.47  0.270 / 0.390
G18     289.7          62.0                9.5 +/-    1.09      10.6 +/-    1.09  0.150 / 0.090
G20     52.0           37.2                8.2 +/-    1.55      12.4 +/-    1.55  0.090 / 0.100
G21     353.4          69.2                9.3 +/-    0.28       9.9 +/-    0.28  0.040 / 0.030
G24     125.2          11.1               -6.4 +/-   34.86     -17.4 +/-   34.86  0.040 / 0.040
G27     319.7          16.7                7.8 +/-    2.33      18.5 +/-    2.33  0.160 / 0.240
G29     166.4          33.4               11.0 +/-    0.88      18.0 +/-    0.88  0.160 / 0.200