PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-19:57:50
G02     24.9           61.6                9.4 +/-    1.12      10.5 +/-    1.12  0.030 / 0.030
G05     147.9          56.9               11.3 +/-    0.50      13.3 +/-    0.50  0.030 / 0.050
G06     51.3           18.6                8.8 +/-    1.60      20.0 +/-    1.60  0.030 / 0.030
G12     197.8          71.8               10.4 +/-    0.52      10.9 +/-    0.52  0.030 / 0.040
G19     94.2           15.9               10.5 +/-    2.29      25.5 +/-    2.29  0.170 / 0.070
G25     304.1          49.8                9.8 +/-    3.37      12.4 +/-    3.37  0.090 / 0.060
G29     302.6          22.5                9.5 +/-    1.69      19.7 +/-    1.69  0.190 / 0.200