PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-01:28:00
G02     314.9          81.7               10.7 +/-    0.62      10.8 +/-    0.62  0.050 / 0.040
G05     165.9          28.1               14.8 +/-    1.43      27.0 +/-    1.43  0.050 / 0.040
G06     40.3           46.4                9.8 +/-    1.16      13.0 +/-    1.16  0.030 / 0.030
G12     318.4          64.2               11.8 +/-    0.75      12.9 +/-    0.75  0.030 / 0.030
G17     79.0           19.0               11.6 +/-    1.99      26.2 +/-    1.99  0.060 / 0.090
G19     68.4           32.1               11.3 +/-    0.98      18.9 +/-    0.98  0.050 / 0.080
G24     233.9          27.3               14.3 +/-    1.09      26.5 +/-    1.09  0.100 / 0.150
G25     317.8          22.0                9.7 +/-    2.83      20.2 +/-    2.83  0.140 / 0.160