PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/10-07:12:40
G10     271.6          41.6                8.3 +/-    1.14      11.7 +/-    1.14  0.070 / 0.060
G13     40.0           14.6                4.0 +/-    2.72      10.1 +/-    2.72  0.110 / 0.060
G15     54.6           44.6                5.9 +/-    0.65       7.9 +/-    0.65  0.040 / 0.030
G20     306.0          62.0                6.4 +/-    0.66       7.1 +/-    0.66  0.030 / 0.030
G21     22.3           74.4                7.2 +/-    1.10       7.4 +/-    1.10  0.290 / 0.240
G24     116.0          16.6                7.3 +/-    1.62      17.4 +/-    1.62  0.190 / 0.160
G27     317.7          20.4                2.8 +/-    2.76       6.2 +/-    2.76  0.150 / 0.290
G29     165.6          22.9                6.4 +/-    1.64      13.2 +/-    1.64  0.120 / 0.260