PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/24-16:27:50
G02     208.4          44.9               16.4 +/-    0.69      22.1 +/-    0.69  0.060 / 0.070
G06     121.0          79.1               16.2 +/-    0.50      16.5 +/-    0.50  0.050 / 0.060
G12     314.1          25.5               10.1 +/-    2.09      19.5 +/-    2.09  0.080 / 0.110
G17     49.2           38.2               12.3 +/-    1.36      18.5 +/-    1.36  0.120 / 0.140
G19     26.8           55.9               13.6 +/-    0.98      16.0 +/-    0.98  0.020 / 0.020
G24     285.0          41.4               20.2 +/-    0.95      28.7 +/-    0.95  0.020 / 0.030
G28     113.9          22.3               13.3 +/-    1.77      27.7 +/-    1.77  0.040 / 0.050