PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-01:28:10
G02     38.4           50.9               10.8 +/-    0.75      13.4 +/-    0.75  0.030 / 0.040
G05     125.2          66.0               13.4 +/-    0.53      14.5 +/-    0.53  0.060 / 0.040
G06     56.8           11.7                9.1 +/-    1.29      24.4 +/-    1.29  0.030 / 0.040
G12     193.5          62.1               13.4 +/-    0.61      15.0 +/-    0.61  0.020 / 0.040
G25     289.9          55.6               10.5 +/-    0.62      12.4 +/-    0.62  0.040 / 0.060
G29     310.4          30.9                9.3 +/-    1.21      15.9 +/-    1.21  0.040 / 0.060