PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/15-12:58:10
G10     245.5          21.6                4.2 +/-    1.64       8.9 +/-    1.64  0.030 / 0.040
G13     60.6           33.8                3.2 +/-    1.10       5.1 +/-    1.10  0.030 / 0.030
G15     96.3           57.0                4.5 +/-    0.72       5.3 +/-    0.72  0.030 / 0.040
G16     304.4          14.0                2.0 +/-    1.48       5.1 +/-    1.48  0.040 / 0.040
G18     262.4          54.3                4.6 +/-    1.66       5.6 +/-    1.66  0.090 / 0.160
G20     34.2           58.0                3.3 +/-    0.72       3.8 +/-    0.72  0.080 / 0.170
G21     331.1          58.7                1.8 +/-    0.64       2.0 +/-    0.64  0.110 / 0.280
G26     275.1          17.6                3.4 +/-    2.54       7.9 +/-    2.54  0.120 / 0.270
G29     161.3          54.0                4.2 +/-    0.43       5.0 +/-    0.43  0.060 / 0.090