PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-18:42:30
G02     237.7          73.1                8.1 +/-    0.54       8.4 +/-    0.54  0.110 / 0.260
G05     172.2          15.3               11.1 +/-    1.85      27.3 +/-    1.85  0.090 / 0.210
G06     41.2           57.4                8.5 +/-    0.47       9.9 +/-    0.47  0.040 / 0.050
G12     322.6          54.7                7.2 +/-    1.30       8.6 +/-    1.30  0.030 / 0.050
G17     70.3           22.7                9.3 +/-    0.85      19.3 +/-    0.85  0.030 / 0.050
G19     53.7           41.7                8.9 +/-    0.56      12.6 +/-    0.56  0.030 / 0.040
G24     244.6          35.2               11.2 +/-    0.86      17.7 +/-    0.86  0.140 / 0.360
G25     316.5          11.8                4.9 +/-   21.06      13.0 +/-   21.06  0.110 / 0.350