PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-17:58:10
G07     58.9           67.0               13.0 +/-    1.12      14.0 +/-    1.12  0.040 / 0.040
G08     53.1           41.8               11.0 +/-    1.22      15.6 +/-    1.22  0.030 / 0.050
G09     179.4          41.3               14.9 +/-    0.72      21.2 +/-    0.72  0.150 / 0.370
G11     120.7          34.0               14.9 +/-    0.68      24.2 +/-    0.68  0.110 / 0.410
G17     199.0          11.7                4.4 +/-   31.23      11.8 +/-   31.23  0.220 / 0.380
G18     104.9          14.9               13.2 +/-    1.90      32.9 +/-    1.90  0.290 / 0.430
G23     160.5          11.0               14.7 +/-    2.32      40.1 +/-    2.32  0.140 / 0.210
G27     38.1           11.5               10.0 +/-    1.70      27.1 +/-    1.70  0.260 / 0.260
G28     266.3          47.2               15.1 +/-    4.04      19.7 +/-    4.04  0.070 / 0.070
G30     330.9          59.2               12.1 +/-    0.63      13.9 +/-    0.63  0.080 / 0.070