PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-17:28:00
G02     201.8          18.7               12.0 +/-    2.40      27.2 +/-    2.40  0.080 / 0.130
G06     169.5          56.1               11.8 +/-    0.70      13.9 +/-    0.70  0.070 / 0.120
G13     227.6          12.2                9.2 +/-    3.95      24.3 +/-    3.95  0.130 / 0.650
G17     27.3           56.4                8.5 +/-    0.43      10.0 +/-    0.43  0.080 / 0.590
G19     336.1          70.7                9.2 +/-    0.58       9.7 +/-    0.58  0.140 / 0.210
G24     310.3          29.4                8.1 +/-    2.12      14.3 +/-    2.12  0.130 / 0.250
G28     90.2           38.6                9.6 +/-    1.15      14.3 +/-    1.15  0.020 / 0.040
G30     157.9          15.1               10.1 +/-    3.95      25.2 +/-    3.95  0.030 / 0.050