PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-21:12:10
G02     38.6           50.9               10.2 +/-    0.36      12.8 +/-    0.36  0.030 / 0.040
G05     122.0          67.4               10.1 +/-    0.57      10.9 +/-    0.57  0.040 / 0.040
G12     187.9          57.0               10.7 +/-    1.61      12.5 +/-    1.61  0.050 / 0.050
G25     283.7          57.4               10.1 +/-    1.31      11.8 +/-    1.31  0.050 / 0.050
G29     311.8          32.4                8.2 +/-    1.80      13.7 +/-    1.80  0.030 / 0.050