PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/22-10:42:50
G10     281.1          46.0                6.0 +/-    1.09       8.0 +/-    1.09  0.040 / 0.030
G15     49.8           38.5                4.7 +/-    1.02       7.1 +/-    1.02  0.040 / 0.030
G20     323.4          64.3                5.2 +/-    0.62       5.7 +/-    0.62  0.070 / 0.070
G21     62.9           75.3                5.7 +/-    0.85       5.9 +/-    0.85  0.080 / 0.090
G24     107.7          20.9                6.8 +/-    1.33      14.6 +/-    1.33  0.110 / 0.100
G27     313.3          25.5                4.4 +/-    1.64       8.4 +/-    1.64  0.140 / 0.240
G29     166.2          15.5                4.2 +/-    3.08      10.3 +/-    3.08  0.120 / 0.230
G32     207.2          16.9                5.8 +/-    2.40      13.9 +/-    2.40  0.100 / 0.170