PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-12:42:50
G01     226.2          17.7                5.8 +/-    1.47      13.4 +/-    1.47  0.030 / 0.040
G03     280.2          71.4                7.8 +/-    0.50       8.2 +/-    0.50  0.030 / 0.030
G14     85.8           24.2                8.5 +/-    1.35      17.0 +/-    1.35  0.110 / 0.200
G16     150.8          42.1                7.2 +/-    1.02      10.1 +/-    1.02  0.110 / 0.220
G22     206.9          69.5                8.2 +/-    0.41       8.7 +/-    0.41  0.040 / 0.030
G23     307.0          37.3                6.1 +/-    1.03       9.3 +/-    1.03  0.040 / 0.030
G26     103.1          54.5                8.3 +/-    0.70       9.9 +/-    0.70  0.110 / 0.190
G31     45.0           33.2                6.0 +/-    1.31       9.8 +/-    1.31  0.160 / 0.220
G32     96.9           10.2                8.1 +/-    1.89      22.6 +/-    1.89  0.050 / 0.080