PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-16:12:30
G02     205.0          36.0               14.4 +/-    1.79      22.4 +/-    1.79  0.120 / 0.130
G03     55.8           9.7                11.2 +/-    1.40      31.5 +/-    1.40  0.080 / 0.160
G06     153.6          72.7               13.2 +/-    0.52      13.7 +/-    0.52  0.130 / 0.220
G12     310.0          18.6               10.0 +/-    2.00      22.9 +/-    2.00  0.130 / 0.230
G17     41.9           44.3               10.1 +/-    1.24      13.8 +/-    1.24  0.030 / 0.040
G19     13.5           61.8               11.6 +/-    0.91      13.0 +/-    0.91  0.040 / 0.040
G24     295.8          38.7                9.2 +/-    1.58      13.6 +/-    1.58  0.030 / 0.020
G28     106.5          28.3               11.9 +/-    1.65      21.5 +/-    1.65  0.040 / 0.020