PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/21-19:27:50
G10     257.8          33.8                9.8 +/-    2.00      16.0 +/-    2.00  0.040 / 0.050
G13     46.8           23.8                9.2 +/-    2.05      18.6 +/-    2.05  0.040 / 0.060
G15     71.7           54.9               10.2 +/-    0.36      12.1 +/-    0.36  0.130 / 0.170
G16     287.5          15.0                5.6 +/-    3.85      14.0 +/-    3.85  0.090 / 0.210
G20     283.1          56.5               10.7 +/-    2.78      12.6 +/-    2.78  0.050 / 0.040
G21     344.0          64.9               11.0 +/-    0.86      12.0 +/-    0.86  0.040 / 0.040
G26     261.0          12.2                9.9 +/-    3.49      26.3 +/-    3.49  0.230 / 0.350
G27     322.0          11.0               -9.8 +/-   28.20     -26.7 +/-   28.20  0.250 / 0.390
G29     165.7          42.1               11.9 +/-    0.43      16.7 +/-    0.43  0.150 / 0.160