PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/22-18:58:00
G02     42.2           48.0                8.1 +/-    1.08      10.4 +/-    1.08  0.020 / 0.020
G05     108.1          69.5                9.7 +/-    0.61      10.3 +/-    0.61  0.020 / 0.020
G12     184.3          49.5               10.9 +/-    0.51      13.8 +/-    0.51  0.030 / 0.060
G25     271.2          58.9                4.3 +/-    2.04       4.9 +/-    2.04  0.050 / 0.050
G29     315.3          36.6                7.7 +/-    1.28      11.8 +/-    1.28  0.040 / 0.050