PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-20:28:10
G10     290.3          50.2               11.8 +/-    0.75      14.9 +/-    0.75  0.060 / 0.090
G15     47.4           33.5                8.1 +/-    0.55      13.3 +/-    0.55  0.090 / 0.090
G20     340.9          65.3               10.3 +/-    0.73      11.3 +/-    0.73  0.040 / 0.050
G21     69.5           77.0               12.0 +/-    0.65      12.3 +/-    0.65  0.040 / 0.060
G24     105.7          24.0               11.7 +/-    1.22      23.4 +/-    1.22  0.040 / 0.070
G27     307.0          31.2               11.1 +/-    1.21      18.9 +/-    1.21  0.040 / 0.070
G29     168.1          13.8               15.6 +/-    1.59      40.0 +/-    1.59  0.100 / 0.180
G32     207.7          26.5               11.4 +/-    1.66      21.5 +/-    1.66  0.080 / 0.180