PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-10:12:30
G10     246.1          22.3                4.6 +/-    2.08       9.5 +/-    2.08  0.210 / 0.510
G13     59.5           33.3                3.1 +/-    1.28       5.0 +/-    1.28  0.220 / 0.510
G15     94.9           57.1                5.2 +/-    1.27       6.1 +/-    1.27  0.030 / 0.040
G16     302.2          14.8                1.2 +/-    1.49       3.1 +/-    1.49  0.030 / 0.040
G20     32.7           59.2                4.1 +/-    0.75       4.7 +/-    0.75  0.040 / 0.040
G21     329.6          57.9                3.0 +/-    0.30       3.5 +/-    0.30  0.050 / 0.040
G26     273.0          17.5                4.8 +/-    1.59      11.3 +/-    1.59  0.090 / 0.130
G29     162.4          54.7                5.8 +/-    0.65       6.9 +/-    0.65  0.080 / 0.110