PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/30-23:13:10
G02     58.1           34.1                9.8 +/-    2.35      15.8 +/-    2.35  0.060 / 0.110
G05     59.6           61.7                9.4 +/-    0.67      10.5 +/-    0.67  0.060 / 0.100
G12     183.3          32.2               10.7 +/-    1.51      17.9 +/-    1.51  0.030 / 0.030
G13     129.1          14.3               11.3 +/-    3.28      28.6 +/-    3.28  0.030 / 0.040
G15     165.7          10.4               -6.3 +/-   19.56     -17.4 +/-   19.56  0.100 / 0.290
G21     270.0          15.8               11.2 +/-    1.47      27.3 +/-    1.47  0.160 / 0.350
G25     238.8          52.8               11.2 +/-    4.25      13.6 +/-    4.25  0.030 / 0.040
G29     326.6          52.2               11.5 +/-    1.27      14.1 +/-    1.27  0.040 / 0.040