PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-14:42:50
G10     253.7          28.6                5.3 +/-    2.23       9.5 +/-    2.23  0.080 / 0.050
G13     51.1           28.8                4.4 +/-    2.40       8.0 +/-    2.40  0.060 / 0.060
G15     76.9           55.3                5.5 +/-    0.75       6.5 +/-    0.75  0.090 / 0.330
G16     295.7          13.9                2.2 +/-    2.88       5.6 +/-    2.88  0.110 / 0.320
G18     277.6          60.0                4.6 +/-    1.07       5.2 +/-    1.07  0.110 / 0.140
G20     42.9           48.5                3.6 +/-    1.04       4.6 +/-    1.04  0.060 / 0.160
G21     347.4          65.9                4.2 +/-    0.61       4.5 +/-    0.61  0.080 / 0.480
G26     266.4          14.0                3.0 +/-    2.20       7.5 +/-    2.20  0.070 / 0.450
G29     164.0          42.1                6.3 +/-    0.49       8.9 +/-    0.49  0.040 / 0.040