PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-05:27:50
G10     258.7          33.9                5.6 +/-    1.54       9.1 +/-    1.54  0.170 / 0.230
G13     46.3           23.6                4.3 +/-    2.16       8.7 +/-    2.16  0.150 / 0.240
G15     68.6           53.2                5.0 +/-    0.74       6.1 +/-    0.74  0.050 / 0.040
G16     290.6          13.7                3.9 +/-    1.98       9.9 +/-    1.98  0.050 / 0.040
G20     283.3          56.3                5.9 +/-    2.24       6.9 +/-    2.24  0.070 / 0.080
G21     349.9          67.1                5.2 +/-    0.89       5.6 +/-    0.89  0.100 / 0.090
G26     262.6          11.7                2.6 +/-   19.06       7.0 +/-   19.06  0.080 / 0.270
G27     322.1          10.8              -11.1 +/-   23.30     -30.3 +/-   23.30  0.080 / 0.240
G29     164.0          36.5                8.3 +/-    1.17      12.8 +/-    1.17  0.040 / 0.080