PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/28-18:27:20
G02     39.9           49.9                8.7 +/-    0.44      11.0 +/-    0.44  0.030 / 0.040
G05     116.2          68.8               10.1 +/-    0.84      10.8 +/-    0.84  0.020 / 0.030
G12     184.5          52.1                8.9 +/-    2.14      10.9 +/-    2.14  0.040 / 0.060
G25     276.3          58.7                8.9 +/-    1.03      10.2 +/-    1.03  0.050 / 0.050
G29     313.7          34.6                7.9 +/-    1.50      12.7 +/-    1.50  0.040 / 0.070