PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-16:42:40
G08     274.4          21.4                9.8 +/-    1.77      20.9 +/-    1.77  0.160 / 0.120
G10     48.4           59.6                9.7 +/-    1.27      11.0 +/-    1.27  0.090 / 0.110
G14     247.1          56.9               11.7 +/-    0.35      13.7 +/-    0.35  0.040 / 0.050
G20     89.3           38.7               10.8 +/-    1.50      16.0 +/-    1.50  0.050 / 0.060
G21     153.1          22.4               13.1 +/-    1.86      27.1 +/-    1.86  0.030 / 0.030
G24     44.3           16.6                8.3 +/-    3.44      20.0 +/-    3.44  0.040 / 0.030
G27     237.8          21.9                9.5 +/-    2.08      20.0 +/-    2.08  0.210 / 0.260
G31     180.5          21.3               11.5 +/-    1.85      24.6 +/-    1.85  0.140 / 0.360
G32     312.6          77.1                9.9 +/-    0.69      10.1 +/-    0.69  0.110 / 0.180