PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-17:58:00
G02     56.5           35.4               21.3 +/-    0.58      33.5 +/-    0.58  0.130 / 0.480
G05     69.9           67.7               23.7 +/-    0.64      25.4 +/-    0.64  0.130 / 0.540
G12     186.4          36.9               31.4 +/-    2.46      48.2 +/-    2.46  0.030 / 0.060
G13     132.7          12.5               32.2 +/-    4.21      84.8 +/-    4.21  0.040 / 0.060
G20     205.7          56.0               31.0 +/-    1.09      36.5 +/-    1.09  0.060 / 0.130
G21     268.6          16.5               29.2 +/-    2.03      70.0 +/-    2.03  0.080 / 0.070
G25     237.9          53.9               29.2 +/-    0.92      35.2 +/-    0.92  0.070 / 0.050
G29     329.4          55.3               26.5 +/-    1.17      31.4 +/-    1.17  0.050 / 0.060