PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-10:58:10
G10     261.1          34.1                3.8 +/-    1.28       6.2 +/-    1.28  0.060 / 0.060
G13     45.3           23.2                3.2 +/-    1.27       6.6 +/-    1.27  0.060 / 0.070
G15     64.6           51.3                6.1 +/-    0.49       7.6 +/-    0.49  0.050 / 0.040
G16     285.6          13.3                4.2 +/-    2.04      10.9 +/-    2.04  0.050 / 0.050
G20     46.8           44.8                5.2 +/-    0.61       7.0 +/-    0.61  0.150 / 0.270
G21     355.6          69.3                5.9 +/-    0.75       6.3 +/-    0.75  0.100 / 0.240
G24     125.5          10.7               -7.3 +/-   33.65     -20.0 +/-   33.65  0.140 / 0.300
G26     257.4          10.5                3.7 +/-    2.07      10.2 +/-    2.07  0.140 / 0.360
G27     320.4          15.3                1.8 +/-    1.05       4.4 +/-    1.05  0.200 / 0.340
G29     166.6          35.8                7.0 +/-    0.86      11.0 +/-    0.86  0.190 / 0.330