PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-15:58:00
G10     261.1          33.9                8.6 +/-    1.54      14.0 +/-    1.54  0.110 / 0.160
G13     45.4           23.5                6.5 +/-    2.95      13.2 +/-    2.95  0.360 / 0.190
G15     64.6           51.3                9.8 +/-    1.01      12.2 +/-    1.01  0.050 / 0.090
G16     288.7          12.6                8.2 +/-    2.72      21.6 +/-    2.72  0.060 / 0.070
G18     292.5          63.6                9.4 +/-    0.96      10.3 +/-    0.96  0.330 / 0.250
G20     49.2           41.5                7.3 +/-    0.63      10.4 +/-    0.63  0.320 / 0.360
G21     5.4            71.0                8.9 +/-    0.47       9.3 +/-    0.47  0.150 / 0.220
G24     125.9          10.7              -12.0 +/-   30.70     -33.0 +/-   30.70  0.110 / 0.230
G27     320.2          15.6                5.6 +/-    2.59      13.6 +/-    2.59  0.050 / 0.030
G29     165.3          32.9               13.3 +/-    0.74      21.9 +/-    0.74  0.040 / 0.040