PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-15:28:10
G02     201.2          20.0               14.0 +/-    3.00      30.8 +/-    3.00  0.190 / 0.250
G06     170.6          55.3               13.2 +/-    1.36      15.6 +/-    1.36  0.160 / 0.270
G13     228.0          12.4               14.7 +/-    3.51      38.9 +/-    3.51  0.080 / 0.160
G17     27.1           56.6               11.1 +/-    0.39      13.0 +/-    0.39  0.080 / 0.150
G19     335.2          70.8               11.7 +/-    0.58      12.3 +/-    0.58  0.190 / 0.580
G24     310.4          29.2                9.7 +/-    1.07      17.3 +/-    1.07  0.130 / 0.670
G28     90.1           38.6               11.3 +/-    0.79      16.8 +/-    0.79  0.020 / 0.040
G30     157.8          14.9               13.7 +/-    1.62      34.3 +/-    1.62  0.020 / 0.040