PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-01:57:20
G02     53.3           37.6                6.9 +/-    0.59      10.4 +/-    0.59  0.060 / 0.060
G05     72.1           66.0                8.4 +/-    0.34       9.1 +/-    0.34  0.040 / 0.080
G12     186.2          41.3               12.9 +/-    2.36      18.3 +/-    2.36  0.040 / 0.040
G21     264.6          11.7               10.8 +/-    2.31      29.1 +/-    2.31  0.030 / 0.040
G25     252.5          56.5                9.0 +/-    1.20      10.5 +/-    1.20  0.060 / 0.060
G29     322.4          46.0                8.3 +/-    1.15      11.0 +/-    1.15  0.050 / 0.050