PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/28-18:58:10
G10     257.7          33.8               17.6 +/-    2.00      28.6 +/-    2.00  0.040 / 0.050
G13     46.9           23.9               14.6 +/-    1.39      29.2 +/-    1.39  0.040 / 0.050
G15     71.5           54.6               17.0 +/-    0.68      20.3 +/-    0.68  0.160 / 0.730
G16     287.5          15.1               11.0 +/-    1.90      27.3 +/-    1.90  0.160 / 0.610
G20     283.0          56.5               19.2 +/-    2.92      22.5 +/-    2.92  0.060 / 0.180
G21     343.9          64.8               18.2 +/-    0.77      19.9 +/-    0.77  0.090 / 0.180
G26     261.1          12.3               16.1 +/-    1.48      42.7 +/-    1.48  0.050 / 0.030
G27     322.0          10.9              -11.8 +/-   25.96     -32.2 +/-   25.96  0.050 / 0.030
G29     165.7          42.3               19.6 +/-    0.68      27.4 +/-    0.68  0.150 / 0.170