PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-22:27:50
G02     70.6           24.6               10.9 +/-    0.98      21.6 +/-    0.98  0.030 / 0.050
G05     46.5           47.5               10.0 +/-    0.71      13.0 +/-    0.71  0.030 / 0.060
G12     179.8          15.7               15.1 +/-    1.64      37.0 +/-    1.64  0.200 / 0.250
G13     115.6          24.8               13.2 +/-    1.16      25.8 +/-    1.16  0.220 / 0.410
G15     157.8          23.0               15.5 +/-    1.19      31.8 +/-    1.19  0.110 / 0.250
G21     282.9          25.3               14.3 +/-    1.69      27.8 +/-    1.69  0.120 / 0.210
G25     219.7          40.0               15.3 +/-    1.06      22.3 +/-    1.06  0.090 / 0.100
G26     317.1          12.6                9.2 +/-    2.39      24.3 +/-    2.39  0.060 / 0.100
G29     336.9          67.9               11.3 +/-    0.72      12.1 +/-    0.72  0.070 / 0.140