PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-19:28:10
G13     53.8           29.2               10.2 +/-    1.61      18.1 +/-    1.61  0.040 / 0.040
G15     88.8           57.9               11.2 +/-    0.95      13.0 +/-    0.95  0.040 / 0.050
G16     296.2          15.9                9.0 +/-    1.58      21.9 +/-    1.58  0.130 / 0.150
G20     269.8          51.1               11.3 +/-    3.03      14.1 +/-    3.03  0.120 / 0.150
G21     332.3          58.8                9.9 +/-    0.80      11.4 +/-    0.80  0.030 / 0.040
G26     269.0          15.8               11.5 +/-    2.74      27.9 +/-    2.74  0.030 / 0.050
G29     163.4          51.8               13.5 +/-    0.90      16.6 +/-    0.90  0.170 / 0.400