PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-15:27:50
G02     62.1           30.1                9.4 +/-    1.84      16.4 +/-    1.84  0.040 / 0.020
G05     56.6           61.0               12.4 +/-    0.46      14.0 +/-    0.46  0.040 / 0.030
G12     185.6          31.1               17.6 +/-    2.28      30.1 +/-    2.28  0.170 / 0.260
G13     127.8          16.7               20.3 +/-    1.71      48.4 +/-    1.71  0.160 / 0.210
G15     161.7          14.2               23.2 +/-    3.17      58.7 +/-    3.17  0.030 / 0.040
G20     209.8          61.4               16.3 +/-    0.54      18.3 +/-    0.54  0.030 / 0.040
G21     274.3          21.7               12.8 +/-    3.69      27.1 +/-    3.69  0.090 / 0.100
G25     231.6          49.8               15.3 +/-    3.28      19.4 +/-    3.28  0.100 / 0.090
G29     336.1          62.6               10.8 +/-    0.43      12.0 +/-    0.43  0.120 / 0.280