PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-01:58:00
G02     53.3           37.6                7.0 +/-    1.91      10.5 +/-    1.91  0.040 / 0.070
G05     72.1           66.0                8.5 +/-    0.40       9.3 +/-    0.40  0.050 / 0.070
G12     186.2          41.3               13.1 +/-    1.17      18.6 +/-    1.17  0.150 / 0.340
G13     134.7          9.6                -6.2 +/-    6.56     -17.4 +/-    6.56  0.230 / 0.430
G21     264.6          11.7                9.0 +/-   16.61      24.2 +/-   16.61  0.040 / 0.030
G25     252.5          56.5                7.7 +/-    1.39       9.0 +/-    1.39  0.030 / 0.030
G29     322.4          46.0                9.9 +/-    0.50      13.2 +/-    0.50  0.050 / 0.050