PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-19:58:00
G10     276.7          44.6               12.4 +/-    1.28      16.8 +/-    1.28  0.090 / 0.130
G13     38.5           11.0                9.9 +/-    2.90      27.0 +/-    2.90  0.110 / 0.160
G15     52.3           42.4               11.6 +/-    0.39      16.3 +/-    0.39  0.040 / 0.050
G20     316.7          63.7               12.4 +/-    1.11      13.7 +/-    1.11  0.040 / 0.040
G21     24.4           75.5               12.7 +/-    0.68      13.1 +/-    0.68  0.150 / 0.600
G24     115.4          18.6               14.9 +/-    1.39      33.9 +/-    1.39  0.170 / 0.660
G27     314.8          24.5               10.7 +/-    2.40      21.2 +/-    2.40  0.030 / 0.050
G29     168.0          23.9               13.8 +/-    1.64      27.7 +/-    1.64  0.040 / 0.070
G32     205.1          16.7               17.2 +/-    3.39      41.1 +/-    3.39  0.120 / 0.250