PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-03:27:50
G03     190.5          19.0                4.9 +/-    0.98      11.0 +/-    0.98  0.310 / 0.420
G07     294.5          40.8                5.4 +/-    3.58       7.7 +/-    3.58  0.160 / 0.250
G08     139.6          30.4                6.3 +/-    1.20      10.9 +/-    1.20  0.070 / 0.100
G09     320.7          69.3                5.3 +/-    0.76       5.6 +/-    0.76  0.070 / 0.120
G16     42.5           33.4                4.1 +/-    0.98       6.8 +/-    0.98  0.030 / 0.030
G23     126.1          75.8                4.3 +/-    0.94       4.5 +/-    0.94  0.030 / 0.020
G27     95.5           34.7                5.6 +/-    1.18       9.0 +/-    1.18  0.110 / 0.170
G30     275.7          12.7                3.3 +/-   13.59       8.7 +/-   13.59  0.120 / 0.170