PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-00:42:30
G02     29.5           58.6                7.4 +/-    0.94       8.6 +/-    0.94  0.030 / 0.030
G05     143.6          58.7               10.2 +/-    0.72      11.8 +/-    0.72  0.020 / 0.030
G06     51.6           18.7                6.9 +/-    2.46      15.7 +/-    2.46  0.030 / 0.040
G12     204.8          72.3                8.7 +/-    0.45       9.1 +/-    0.45  0.030 / 0.030
G19     95.9           13.9                8.9 +/-    2.00      22.8 +/-    2.00  0.110 / 0.170
G25     303.5          49.7                7.5 +/-    4.69       9.5 +/-    4.69  0.180 / 0.250
G29     303.7          23.8                9.0 +/-    1.18      18.1 +/-    1.18  0.060 / 0.080