PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-02:13:00
G02     50.1           40.0                6.3 +/-    1.82       9.1 +/-    1.82  0.030 / 0.050
G05     82.0           67.9                6.9 +/-    0.83       7.4 +/-    0.83  0.030 / 0.050
G12     189.6          48.3               11.0 +/-    0.58      14.1 +/-    0.58  0.130 / 0.310
G21     262.5          10.9               -4.3 +/-   13.14     -11.8 +/-   13.14  0.030 / 0.050
G25     257.5          58.1                8.7 +/-    1.14      10.1 +/-    1.14  0.040 / 0.050
G29     323.3          47.1                7.6 +/-    0.48      10.0 +/-    0.48  0.030 / 0.020