PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-10:13:10
G10     242.3          18.7                3.4 +/-    1.09       7.8 +/-    1.09  0.030 / 0.040
G13     65.2           35.2                3.8 +/-    0.65       6.0 +/-    0.65  0.030 / 0.050
G15     105.1          56.3                5.7 +/-    0.41       6.7 +/-    0.41  0.090 / 0.310
G16     307.1          14.1                2.6 +/-    1.63       6.6 +/-    1.63  0.080 / 0.350
G20     27.9           63.5                3.7 +/-    0.66       4.1 +/-    0.66  0.040 / 0.060
G21     324.0          54.6                3.0 +/-    1.36       3.6 +/-    1.36  0.030 / 0.060
G26     278.1          19.0                4.3 +/-    0.91       9.8 +/-    0.91  0.090 / 0.280
G29     160.3          60.4                7.6 +/-    0.80       8.6 +/-    0.80  0.110 / 0.310