PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-22:57:40
G02     247.2          77.5               11.1 +/-    0.34      11.3 +/-    0.34  0.040 / 0.040
G05     170.3          18.2               15.6 +/-    1.81      35.9 +/-    1.81  0.060 / 0.030
G06     40.5           55.9               10.7 +/-    0.69      12.7 +/-    0.69  0.120 / 0.130
G12     321.7          54.4               11.1 +/-    0.84      13.4 +/-    0.84  0.120 / 0.150
G17     71.0           23.7               10.1 +/-    1.73      20.4 +/-    1.73  0.120 / 0.120
G19     57.5           39.0               11.2 +/-    1.13      16.6 +/-    1.13  0.090 / 0.140
G24     243.2          33.9               14.1 +/-    2.66      22.8 +/-    2.66  0.310 / 0.370
G25     316.9          13.0                5.2 +/-   17.08      13.6 +/-   17.08  0.100 / 0.260