PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-18:42:40
G02     55.4           36.6                7.7 +/-    0.55      11.8 +/-    0.55  0.150 / 0.290
G05     63.7           64.4                9.1 +/-    0.42       9.9 +/-    0.42  0.130 / 0.320
G12     184.9          36.5               10.8 +/-    2.48      16.7 +/-    2.48  0.050 / 0.090
G13     129.1          12.9               10.1 +/-    3.64      26.5 +/-    3.64  0.070 / 0.080
G15     165.7          10.0               -9.0 +/-   17.65     -25.1 +/-   17.65  0.050 / 0.070
G21     268.9          14.5               10.5 +/-    1.55      26.4 +/-    1.55  0.060 / 0.070
G25     243.0          54.1                9.2 +/-    0.51      11.1 +/-    0.51  0.030 / 0.040
G29     326.7          51.6                8.9 +/-    0.91      11.0 +/-    0.91  0.030 / 0.040