PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-17:42:50
G02     77.2           19.4               10.0 +/-    0.96      22.2 +/-    0.96  0.040 / 0.070
G05     44.5           41.4                9.0 +/-    1.02      12.8 +/-    1.02  0.040 / 0.060
G12     178.7          10.0               12.5 +/-    3.21      34.7 +/-    3.21  0.080 / 0.190
G13     105.5          29.1               11.9 +/-    1.35      21.2 +/-    1.35  0.080 / 0.160
G15     150.7          31.8               12.3 +/-    1.01      20.8 +/-    1.01  0.080 / 0.160
G20     230.2          18.0               11.3 +/-    2.13      26.1 +/-    2.13  0.090 / 0.170
G21     290.6          30.5               10.0 +/-    0.70      17.3 +/-    0.70  0.130 / 0.400
G25     214.3          33.2               13.5 +/-    0.91      22.2 +/-    0.91  0.130 / 0.290
G26     311.5          15.5                8.1 +/-    2.20      19.8 +/-    2.20  0.050 / 0.080
G29     348.6          77.3                8.7 +/-    0.75       8.9 +/-    0.75  0.050 / 0.090