PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-18:12:40
G02     61.9           30.9               21.3 +/-    0.66      36.6 +/-    0.66  0.080 / 0.300
G05     57.4           62.6               23.6 +/-    0.48      26.3 +/-    0.48  0.090 / 0.310
G12     185.0          29.9               32.3 +/-    1.33      56.7 +/-    1.33  0.050 / 0.060
G13     127.6          17.0               27.0 +/-    3.69      63.9 +/-    3.69  0.050 / 0.060
G15     162.2          14.2               43.0 +/-    2.80     109.1 +/-    2.80  0.050 / 0.110
G20     209.4          63.4               33.4 +/-    0.61      36.8 +/-    0.61  0.040 / 0.110
G21     274.0          20.5               28.1 +/-    1.35      61.0 +/-    1.35  0.040 / 0.060
G25     228.6          49.0               33.2 +/-    0.68      42.3 +/-    0.68  0.030 / 0.040
G29     334.6          61.7               27.3 +/-    1.06      30.6 +/-    1.06  0.030 / 0.040