PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/13-17:57:30
G02     26.0           60.1              -16.4 +/-    0.44     -18.7 +/-    0.44  0.020 / 0.040
G05     146.6          58.3               12.0 +/-    1.27      13.8 +/-    1.27  0.020 / 0.030
G06     51.4           18.0                6.4 +/-    1.25      14.7 +/-    1.25  0.050 / 0.070
G12     206.5          72.9                9.1 +/-    0.52       9.5 +/-    0.52  0.040 / 0.070
G19     97.0           10.4                8.0 +/-    2.11      22.2 +/-    2.11  0.040 / 0.050
G25     303.0          49.8                7.9 +/-    1.10       9.9 +/-    1.10  0.040 / 0.050
G29     304.3          25.1               10.1 +/-    2.30      19.7 +/-    2.30  0.060 / 0.170