PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-00:12:30
G02     307.2          81.7                9.4 +/-    0.78       9.5 +/-    0.78  0.040 / 0.040
G05     166.2          27.4               13.9 +/-    0.59      25.8 +/-    0.59  0.020 / 0.040
G06     40.4           46.5                7.9 +/-    0.70      10.5 +/-    0.70  0.040 / 0.040
G12     318.8          64.2                9.6 +/-    1.01      10.5 +/-    1.01  0.040 / 0.030
G17     78.9           18.5                9.3 +/-    0.95      21.2 +/-    0.95  0.050 / 0.100
G19     67.5           32.8               10.0 +/-    0.55      16.5 +/-    0.55  0.050 / 0.110
G24     234.1          27.6               14.4 +/-    1.25      26.5 +/-    1.25  0.080 / 0.280
G25     317.8          21.6                6.9 +/-    1.56      14.6 +/-    1.56  0.090 / 0.190