PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-21:42:50
G02     58.8           34.0                7.5 +/-    0.70      12.1 +/-    0.70  0.020 / 0.030
G05     58.1           61.1                8.9 +/-    0.38      10.0 +/-    0.38  0.030 / 0.040
G12     182.3          30.0               11.1 +/-    0.97      19.5 +/-    0.97  0.110 / 0.100
G13     127.9          15.2               13.4 +/-    2.63      33.1 +/-    2.63  0.050 / 0.130
G15     165.7          11.1                6.6 +/-   31.41      18.0 +/-   31.41  0.060 / 0.100
G21     271.0          16.5               11.5 +/-    1.36      27.5 +/-    1.36  0.050 / 0.080
G25     236.0          51.8                8.7 +/-    1.14      10.7 +/-    1.14  0.040 / 0.070
G29     327.4          53.3                7.3 +/-    0.79       8.8 +/-    0.79  0.040 / 0.060