PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-01:27:50
G02     38.0           51.3               10.3 +/-    1.15      12.9 +/-    1.15  0.040 / 0.030
G05     126.3          65.8               12.5 +/-    0.50      13.5 +/-    0.50  0.030 / 0.030
G06     56.5           12.0                8.3 +/-    1.37      22.2 +/-    1.37  0.030 / 0.030
G12     193.8          62.6               12.1 +/-    0.48      13.4 +/-    0.48  0.030 / 0.030
G25     290.6          55.4                9.7 +/-    1.69      11.5 +/-    1.69  0.040 / 0.050
G29     310.1          30.6                9.9 +/-    1.31      17.1 +/-    1.31  0.030 / 0.050