PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-15:57:40
G02     212.7          51.4               13.1 +/-    1.40      16.2 +/-    1.40  0.060 / 0.070
G06     71.7           76.4                9.7 +/-    0.60      10.0 +/-    0.60  0.050 / 0.080
G12     318.1          35.7                8.5 +/-    1.52      13.3 +/-    1.52  0.050 / 0.100
G17     53.7           34.5                8.4 +/-    0.46      13.4 +/-    0.46  0.060 / 0.100
G19     27.4           55.5                9.2 +/-    0.41      10.8 +/-    0.41  0.030 / 0.040
G24     270.8          43.0                9.8 +/-    1.26      13.6 +/-    1.26  0.040 / 0.040
G28     118.5          18.1               10.9 +/-    0.89      25.1 +/-    0.89  0.030 / 0.030