PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-15:43:00
G10     256.5          30.6               10.0 +/-    1.89      17.2 +/-    1.89  0.200 / 0.300
G13     48.8           26.9                7.2 +/-    1.54      13.5 +/-    1.54  0.150 / 0.240
G15     71.9           54.1                9.6 +/-    0.43      11.6 +/-    0.43  0.060 / 0.050
G16     293.4          13.4                7.0 +/-    2.04      18.2 +/-    2.04  0.070 / 0.050
G18     282.8          61.4                9.0 +/-    0.66      10.1 +/-    0.66  0.060 / 0.080
G20     45.6           45.5                7.7 +/-    0.64      10.3 +/-    0.64  0.070 / 0.070
G21     354.6          68.2                7.9 +/-    0.83       8.5 +/-    0.83  0.160 / 0.310
G26     264.1          12.7                8.2 +/-    2.11      21.6 +/-    2.11  0.160 / 0.430
G27     321.7          11.7                2.0 +/-   20.62       5.5 +/-   20.62  0.060 / 0.190
G29     164.4          38.2               10.8 +/-    1.67      16.2 +/-    1.67  0.090 / 0.180