PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-19:27:40
G02     31.7           56.9               11.0 +/-    0.91      12.8 +/-    0.91  0.030 / 0.030
G05     148.6          60.6               12.6 +/-    0.30      14.2 +/-    0.30  0.030 / 0.040
G06     54.4           15.5                8.4 +/-    2.30      20.6 +/-    2.30  0.040 / 0.050
G12     197.9          66.6               11.6 +/-    0.16      12.5 +/-    0.16  0.040 / 0.050
G20     198.0          27.9               13.3 +/-    1.00      24.4 +/-    1.00  0.060 / 0.100
G25     290.8          57.4               11.3 +/-    0.91      13.1 +/-    0.91  0.080 / 0.090
G29     309.1          30.8               10.7 +/-    1.65      18.4 +/-    1.65  0.030 / 0.040