PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-23:12:50
G05     46.4           23.8                8.9 +/-    2.02      17.8 +/-    2.02  0.110 / 0.080
G13     86.6           35.9               11.8 +/-    1.60      18.5 +/-    1.60  0.090 / 0.170
G15     138.9          45.5               14.2 +/-    0.86      18.9 +/-    0.86  0.080 / 0.100
G20     238.0          13.1                9.3 +/-    1.74      24.2 +/-    1.74  0.100 / 0.080
G21     304.8          40.9               11.7 +/-    0.98      16.8 +/-    0.98  0.400 / 0.410
G25     203.4          17.4               12.3 +/-    4.07      28.7 +/-    4.07  0.120 / 0.270
G26     294.5          21.0               11.4 +/-    1.19      24.4 +/-    1.19  0.090 / 0.080
G29     142.7          83.2               11.0 +/-    0.76      11.1 +/-    0.76  0.080 / 0.100