PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-21:12:40
G02     66.8           27.9               10.8 +/-    0.76      19.9 +/-    0.76  0.090 / 0.130
G05     50.2           56.9               11.4 +/-    0.84      13.3 +/-    0.84  0.080 / 0.140
G12     182.8          21.7               15.6 +/-    1.65      32.9 +/-    1.65  0.040 / 0.080
G13     121.6          22.0               16.9 +/-    0.83      35.5 +/-    0.83  0.040 / 0.080
G15     159.4          19.4               17.5 +/-    2.17      39.2 +/-    2.17  0.070 / 0.180
G20     214.6          72.6               11.7 +/-    1.03      12.2 +/-    1.03  0.070 / 0.170
G21     279.3          23.8               12.1 +/-    1.36      24.3 +/-    1.36  0.030 / 0.050
G25     218.6          42.0               13.3 +/-    1.71      18.7 +/-    1.71  0.030 / 0.040
G29     338.2          67.2               12.0 +/-    0.75      12.9 +/-    0.75  0.040 / 0.040