PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-19:42:30
G02     38.0           51.8               10.9 +/-    0.78      13.4 +/-    0.78  0.030 / 0.060
G05     136.9          66.5               11.7 +/-    0.41      12.6 +/-    0.41  0.030 / 0.050
G06     58.2           10.7                9.5 +/-    1.30      26.2 +/-    1.30  0.040 / 0.060
G12     192.4          59.1               12.3 +/-    1.05      14.1 +/-    1.05  0.040 / 0.050
G20     199.0          34.8               14.3 +/-    1.02      22.8 +/-    1.02  0.030 / 0.040
G25     277.3          59.9               12.3 +/-    1.11      14.0 +/-    1.11  0.030 / 0.040
G29     313.8          35.9               10.8 +/-    1.01      16.8 +/-    1.01  0.050 / 0.110