PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-12:57:50
G08     293.7          23.7                4.8 +/-    1.47       9.7 +/-    1.47  0.080 / 0.140
G10     5.4            62.8                5.3 +/-    1.32       5.8 +/-    1.32  0.110 / 0.100
G14     228.0          45.8                6.6 +/-    2.54       8.9 +/-    2.54  0.130 / 0.100
G18     317.4          11.5               -4.2 +/-   17.19     -11.2 +/-   17.19  0.120 / 0.150
G20     63.1           53.0                5.2 +/-    1.30       6.3 +/-    1.30  0.050 / 0.080
G21     144.8          37.3                4.4 +/-    0.74       6.7 +/-    0.74  0.050 / 0.070
G24     55.6           24.5                3.9 +/-    1.68       7.6 +/-    1.68  0.360 / 0.470
G27     259.3          32.7                2.7 +/-    2.22       4.5 +/-    2.22  0.390 / 0.360
G32     240.2          63.1                6.3 +/-    1.45       7.0 +/-    1.45  0.030 / 0.060