PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-21:12:50
G10     245.8          24.2               12.8 +/-    0.65      25.5 +/-    0.65  0.040 / 0.060
G13     58.4           31.6                8.6 +/-    1.46      14.5 +/-    1.46  0.040 / 0.050
G15     99.0           58.0               10.8 +/-    1.23      12.5 +/-    1.23  0.060 / 0.120
G16     301.3          15.5                8.5 +/-    2.42      20.9 +/-    2.42  0.060 / 0.170
G20     263.1          47.3               12.0 +/-    3.61      15.7 +/-    3.61  0.030 / 0.040
G21     326.8          55.4               11.3 +/-    0.91      13.4 +/-    0.91  0.030 / 0.040
G26     273.7          17.4               11.0 +/-    2.05      25.7 +/-    2.05  0.250 / 0.300
G29     161.4          56.7               11.9 +/-    0.41      13.9 +/-    0.41  0.270 / 0.300