PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-21:27:30
G02     34.2           54.9                7.7 +/-    1.02       9.2 +/-    1.02  0.050 / 0.050
G05     137.6          65.0                8.8 +/-    0.38       9.7 +/-    0.38  0.040 / 0.050
G06     57.0           11.8                7.1 +/-    1.51      19.1 +/-    1.51  0.040 / 0.080
G12     192.4          61.1                8.9 +/-    0.52      10.1 +/-    0.52  0.030 / 0.040
G20     198.3          32.7               10.3 +/-    1.40      17.1 +/-    1.40  0.050 / 0.050
G25     281.6          59.6               12.7 +/-    1.31      14.5 +/-    1.31  0.040 / 0.060
G29     311.5          33.1                6.6 +/-    1.92      10.9 +/-    1.92  0.030 / 0.030