PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/14-13:43:00
G10     261.2          34.0                2.6 +/-    2.06       4.3 +/-    2.06  0.120 / 0.230
G13     45.3           23.3                1.7 +/-    2.45       3.4 +/-    2.45  0.110 / 0.160
G15     64.4           51.1                2.4 +/-    1.06       3.0 +/-    1.06  0.050 / 0.030
G16     287.1          12.9                3.9 +/-    0.88      10.1 +/-    0.88  0.050 / 0.030
G18     293.7          64.0                3.3 +/-    0.56       3.6 +/-    0.56  0.260 / 0.200
G20     48.3           42.8                1.8 +/-    1.27       2.5 +/-    1.27  0.400 / 0.380
G21     0.8            70.3                1.6 +/-    0.30       1.7 +/-    0.30  0.070 / 0.070
G24     125.7          10.7              -12.9 +/-   25.22     -35.4 +/-   25.22  0.060 / 0.040
G27     320.3          15.5                1.5 +/-    2.51       3.8 +/-    2.51  0.110 / 0.230
G29     166.0          34.2                5.2 +/-    0.84       8.3 +/-    0.84  0.090 / 0.200