PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-20:13:10
G10     286.0          48.6               12.7 +/-    2.90      16.3 +/-    2.90  0.040 / 0.040
G15     48.5           36.1               10.7 +/-    0.76      16.7 +/-    0.76  0.040 / 0.040
G20     333.6          65.1               12.8 +/-    0.61      13.9 +/-    0.61  0.040 / 0.070
G21     55.2           77.3               13.5 +/-    0.55      13.8 +/-    0.55  0.060 / 0.080
G24     108.7          22.5               12.5 +/-    0.86      25.9 +/-    0.86  0.130 / 0.180
G27     309.6          29.4               11.4 +/-    1.23      20.2 +/-    1.23  0.100 / 0.190
G29     168.2          16.7               14.5 +/-    1.61      34.7 +/-    1.61  0.080 / 0.110
G32     206.8          23.5               14.9 +/-    2.16      30.1 +/-    2.16  0.080 / 0.090