PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-19:57:50
G10     270.1          41.3               11.0 +/-    1.24      15.7 +/-    1.24  0.140 / 0.220
G13     40.4           15.4                8.6 +/-    2.45      21.2 +/-    2.45  0.130 / 0.280
G15     56.8           47.1               10.0 +/-    0.99      13.1 +/-    0.99  0.040 / 0.040
G20     304.6          61.9                9.5 +/-    0.80      10.7 +/-    0.80  0.040 / 0.040
G21     7.0            72.7               11.2 +/-    0.71      11.7 +/-    0.71  0.140 / 0.720
G24     120.2          15.4               12.8 +/-    1.54      31.6 +/-    1.54  0.140 / 0.570
G27     317.9          20.4                9.9 +/-    4.31      21.6 +/-    4.31  0.030 / 0.060
G29     167.6          29.5               11.9 +/-    0.63      21.1 +/-    0.63  0.030 / 0.060
G32     204.2          11.5                8.3 +/-   37.93      22.4 +/-   37.93  0.290 / 0.330