PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-20:27:50
G02     352.0          75.8                8.3 +/-    0.52       8.6 +/-    0.52  0.030 / 0.040
G05     164.2          38.7               13.0 +/-    1.11      19.4 +/-    1.11  0.030 / 0.030
G06     44.3           33.1                7.7 +/-    0.73      12.7 +/-    0.73  0.050 / 0.080
G12     286.1          78.9                7.6 +/-    0.75       7.8 +/-    0.75  0.050 / 0.080
G19     83.1           21.1                9.0 +/-    2.54      19.2 +/-    2.54  0.050 / 0.190
G24     224.3          18.2               12.4 +/-    2.82      28.6 +/-    2.82  0.110 / 0.240
G25     314.3          40.4                9.2 +/-    3.52      13.3 +/-    3.52  0.040 / 0.080
G29     292.3          14.4               10.2 +/-    3.61      25.7 +/-    3.61  0.070 / 0.080