PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-21:12:40
G02     29.3           58.7                8.7 +/-    0.61      10.0 +/-    0.61  0.030 / 0.050
G05     146.2          60.8               11.1 +/-    0.50      12.6 +/-    0.50  0.030 / 0.040
G06     54.3           15.4                7.0 +/-    1.24      17.2 +/-    1.24  0.040 / 0.060
G12     196.6          66.6               10.0 +/-    1.48      10.8 +/-    1.48  0.030 / 0.060
G20     197.6          27.7               13.5 +/-    2.09      24.7 +/-    2.09  0.030 / 0.040
G25     291.1          57.6                9.6 +/-    1.29      11.2 +/-    1.29  0.030 / 0.050
G29     308.2          29.4                7.8 +/-    1.25      13.8 +/-    1.25  0.080 / 0.110