PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-21:12:50
G02     33.2           55.7               10.2 +/-    1.10      12.0 +/-    1.10  0.040 / 0.040
G05     140.4          64.0               11.7 +/-    0.50      12.8 +/-    0.50  0.050 / 0.050
G06     56.3           12.7                8.1 +/-    0.87      21.3 +/-    0.87  0.030 / 0.040
G12     193.5          62.5               12.7 +/-    0.49      14.1 +/-    0.49  0.030 / 0.040
G20     198.1          31.4               13.1 +/-    1.15      22.4 +/-    1.15  0.040 / 0.040
G25     283.9          59.3               15.2 +/-    1.00      17.3 +/-    1.00  0.050 / 0.040
G29     310.8          32.2                8.8 +/-    1.35      14.7 +/-    1.35  0.070 / 0.090