PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-08:13:00
G10     256.6          31.1                6.6 +/-    2.10      11.3 +/-    2.10  0.110 / 0.240
G13     48.3           26.2                5.1 +/-    2.08       9.7 +/-    2.08  0.090 / 0.220
G15     72.1           54.3                7.2 +/-    0.38       8.6 +/-    0.38  0.190 / 0.210
G16     289.1          14.5                4.1 +/-    1.00      10.3 +/-    1.00  0.500 / 0.480
G20     27.2           61.3                5.2 +/-    0.78       5.8 +/-    0.78  0.040 / 0.040
G21     344.2          65.4                5.2 +/-    0.54       5.6 +/-    0.54  0.030 / 0.040
G26     260.7          12.7                5.3 +/-    1.73      14.0 +/-    1.73  0.030 / 0.040
G27     321.9          11.2               -7.9 +/-   21.68     -21.4 +/-   21.68  0.050 / 0.040
G29     166.3          41.9                7.5 +/-    0.70      10.6 +/-    0.70  0.050 / 0.050