PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/22-15:27:40
G02     38.2           51.3                8.3 +/-    0.44      10.3 +/-    0.44  0.030 / 0.040
G05     136.0          65.3               11.3 +/-    0.64      12.3 +/-    0.64  0.030 / 0.040
G06     56.0           14.4                6.0 +/-    2.15      15.3 +/-    2.15  0.070 / 0.130
G12     196.6          63.0               10.8 +/-    1.04      12.0 +/-    1.04  0.070 / 0.150
G20     199.4          30.8               11.3 +/-    2.04      19.5 +/-    2.04  0.030 / 0.030
G25     286.4          57.4               10.0 +/-    0.92      11.6 +/-    0.92  0.030 / 0.040
G29     313.8          36.7                9.8 +/-    1.55      15.1 +/-    1.55  0.030 / 0.050