PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-17:43:00
G10     266.1          39.2               10.5 +/-    1.04      15.5 +/-    1.04  0.210 / 0.160
G13     42.0           18.1                7.5 +/-    2.98      17.3 +/-    2.98  0.130 / 0.150
G15     59.3           48.4                7.8 +/-    0.77      10.0 +/-    0.77  0.140 / 0.380
G16     279.5          13.1                7.6 +/-    2.64      19.7 +/-    2.64  0.180 / 0.360
G20     298.7          61.0                9.6 +/-    0.77      10.8 +/-    0.77  0.080 / 0.060
G21     359.5          70.6                9.3 +/-    0.38       9.8 +/-    0.38  0.050 / 0.040
G24     123.4          13.3               12.3 +/-    2.40      31.9 +/-    2.40  0.140 / 0.310
G27     319.4          17.7                9.2 +/-    2.50      21.4 +/-    2.50  0.190 / 0.240
G29     167.2          33.7               10.3 +/-    1.20      16.7 +/-    1.20  0.300 / 0.240