PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-23:28:00
G08     308.5          19.7               10.7 +/-    2.31      23.6 +/-    2.31  0.030 / 0.020
G10     329.7          59.5               12.4 +/-    0.85      14.2 +/-    0.85  0.030 / 0.030
G14     218.0          32.1               16.8 +/-    2.18      28.2 +/-    2.18  0.030 / 0.040
G15     46.7           11.4                9.3 +/-    1.59      25.2 +/-    1.59  0.030 / 0.040
G18     38.0           59.6               12.9 +/-    0.65      14.8 +/-    0.65  0.070 / 0.070
G21     133.7          55.8               15.7 +/-    0.59      18.5 +/-    0.59  0.060 / 0.060
G24     75.9           30.6               13.5 +/-    0.85      23.3 +/-    0.85  0.100 / 0.120
G27     273.3          37.6               14.3 +/-    2.79      21.7 +/-    2.79  0.120 / 0.190
G32     223.3          49.0               14.7 +/-    1.75      18.8 +/-    1.75  0.060 / 0.080