PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-19:43:10
G02     52.0           39.8                7.3 +/-    0.82      10.6 +/-    0.82  0.030 / 0.040
G05     72.9           67.0                7.0 +/-    0.49       7.6 +/-    0.49  0.030 / 0.040
G12     182.5          37.0               11.2 +/-    1.57      17.2 +/-    1.57  0.250 / 0.750
G21     265.1          11.7               10.0 +/-    3.19      26.9 +/-    3.19  0.230 / 0.580
G25     247.5          56.3                8.2 +/-    0.68       9.7 +/-    0.68  0.060 / 0.090
G29     322.6          46.3                6.2 +/-    1.15       8.2 +/-    1.15  0.040 / 0.080