PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-17:42:40
G02     56.5           36.6                5.6 +/-    0.78       8.6 +/-    0.78  0.030 / 0.040
G05     62.6           64.9                5.8 +/-    0.63       6.3 +/-    0.63  0.030 / 0.030
G12     182.7          31.5                8.7 +/-    1.35      14.7 +/-    1.35  0.180 / 0.590
G13     128.6          14.5               10.4 +/-    3.03      26.3 +/-    3.03  0.200 / 0.510
G21     270.6          16.6                7.0 +/-    3.02      16.8 +/-    3.02  0.050 / 0.120
G25     234.4          52.3                6.8 +/-    1.10       8.3 +/-    1.10  0.050 / 0.120
G29     327.2          52.9                4.7 +/-    0.82       5.8 +/-    0.82  0.040 / 0.060