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                8.5 +/-    1.43      13.7 +/-    1.43  0.150 / 0.360
G13     45.4           23.5                6.3 +/-    0.72      12.7 +/-    0.72  0.140 / 0.310
G15     64.6           51.3               10.4 +/-    0.57      13.0 +/-    0.57  0.050 / 0.040
G16     288.7          12.6                9.7 +/-    2.22      25.5 +/-    2.22  0.050 / 0.040
G18     292.5          63.6                9.3 +/-    0.85      10.3 +/-    0.85  0.110 / 0.490
G20     49.2           41.5                8.3 +/-    0.52      11.8 +/-    0.52  0.110 / 0.410
G21     5.4            71.0                9.6 +/-    0.80      10.1 +/-    0.80  0.050 / 0.090
G26     259.8          10.4                7.4 +/-    2.08      20.5 +/-    2.08  0.060 / 0.080
G27     320.2          15.6                5.7 +/-    0.83      13.9 +/-    0.83  0.150 / 0.360
G29     165.3          32.9               14.4 +/-    1.49      23.8 +/-    1.49  0.180 / 0.390