PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-01:28:00
G02     352.0          77.7                8.8 +/-    0.58       9.0 +/-    0.58  0.030 / 0.040
G05     162.6          35.2               16.5 +/-    0.87      26.1 +/-    0.87  0.030 / 0.040
G06     41.9           39.4                7.2 +/-    0.43      10.6 +/-    0.43  0.040 / 0.080
G12     310.2          71.8               10.3 +/-    0.77      10.8 +/-    0.77  0.060 / 0.090
G17     85.2           14.5               10.4 +/-    1.20      26.1 +/-    1.20  0.140 / 0.180
G19     75.3           27.7               10.7 +/-    1.26      19.6 +/-    1.26  0.130 / 0.220
G24     227.8          22.2               16.2 +/-    2.45      33.7 +/-    2.45  0.030 / 0.030
G25     317.3          28.7                7.5 +/-    1.71      13.4 +/-    1.71  0.040 / 0.030