PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-01:28:00
G02     49.8           40.7                8.4 +/-    1.24      12.0 +/-    1.24  0.040 / 0.050
G05     83.3           68.0                9.6 +/-    0.67      10.3 +/-    0.67  0.040 / 0.040
G12     187.0          45.8               13.1 +/-    0.54      17.4 +/-    0.54  0.020 / 0.020
G25     261.1          57.8                9.5 +/-    1.66      11.1 +/-    1.66  0.030 / 0.030
G29     319.6          42.3               10.7 +/-    0.56      15.0 +/-    0.56  0.040 / 0.040