PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-19:28:10
G02     38.6           50.9                7.4 +/-    0.51       9.2 +/-    0.51  0.020 / 0.040
G05     120.9          67.9                8.5 +/-    0.55       9.1 +/-    0.55  0.020 / 0.040
G12     186.0          54.9                8.5 +/-    1.56      10.1 +/-    1.56  0.040 / 0.070
G25     280.9          58.1                8.1 +/-    0.94       9.3 +/-    0.94  0.030 / 0.050
G29     312.4          33.1                6.8 +/-    0.97      11.2 +/-    0.97  0.040 / 0.060