PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-03:27:50
G02     60.8           31.1                7.3 +/-    0.63      12.4 +/-    0.63  0.050 / 0.040
G05     56.1           59.0                6.7 +/-    0.47       7.6 +/-    0.47  0.080 / 0.050
G12     184.8          32.0                9.9 +/-    1.62      16.6 +/-    1.62  0.030 / 0.010
G13     128.0          15.6               11.7 +/-    2.24      28.6 +/-    2.24  0.040 / 0.020
G15     163.1          12.8               10.3 +/-    1.53      27.0 +/-    1.53  0.110 / 0.230
G20     217.6          24.2               12.5 +/-    1.50      24.9 +/-    1.50  0.120 / 0.260
G21     271.7          17.6               13.4 +/-    2.24      31.4 +/-    2.24  0.040 / 0.030
G25     237.2          51.5               10.3 +/-    0.84      12.8 +/-    0.84  0.050 / 0.020
G29     328.4          54.7                7.4 +/-    0.59       8.9 +/-    0.59  0.060 / 0.120