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               11.3 +/-    0.72      13.2 +/-    0.72  0.030 / 0.040
G05     148.6          60.6               13.1 +/-    0.69      14.8 +/-    0.69  0.030 / 0.040
G06     54.4           15.5                9.4 +/-    2.36      23.0 +/-    2.36  0.040 / 0.060
G12     197.9          66.6               11.4 +/-    0.55      12.3 +/-    0.55  0.050 / 0.060
G20     198.0          27.9               15.5 +/-    1.39      28.4 +/-    1.39  0.040 / 0.040
G25     290.8          57.4               11.2 +/-    0.75      13.0 +/-    0.75  0.040 / 0.040
G29     309.1          30.8               10.1 +/-    1.74      17.3 +/-    1.74  0.060 / 0.090