PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-19:27:40
G10     257.8          33.8               10.8 +/-    1.47      17.5 +/-    1.47  0.160 / 0.360
G13     46.8           23.8                8.9 +/-    0.65      17.8 +/-    0.65  0.150 / 0.340
G15     71.7           54.9               10.5 +/-    0.66      12.6 +/-    0.66  0.040 / 0.070
G16     287.5          15.0                7.5 +/-    1.59      18.7 +/-    1.59  0.040 / 0.060
G20     283.1          56.5               12.0 +/-    0.85      14.1 +/-    0.85  0.060 / 0.190
G21     344.0          64.9                9.1 +/-    0.84       9.9 +/-    0.84  0.090 / 0.230
G26     261.0          12.2               11.1 +/-    1.61      29.4 +/-    1.61  0.150 / 0.590
G27     322.0          11.0               -5.8 +/-   34.69     -15.9 +/-   34.69  0.150 / 0.440
G29     165.7          42.1               13.0 +/-    0.82      18.2 +/-    0.82  0.040 / 0.060