PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-21:58:10
G07     19.8           67.7               11.2 +/-    0.99      12.0 +/-    0.99  0.030 / 0.030
G08     65.0           47.9               10.1 +/-    1.10      13.1 +/-    1.10  0.040 / 0.040
G09     180.3          53.3               14.0 +/-    0.82      16.9 +/-    0.82  0.090 / 0.190
G11     130.9          26.4               14.1 +/-    1.74      26.6 +/-    1.74  0.110 / 0.230
G23     160.4          24.1               13.7 +/-    2.12      27.3 +/-    2.12  0.070 / 0.130
G27     42.9           21.6                8.3 +/-    2.34      17.5 +/-    2.34  0.080 / 0.100
G28     253.1          40.5               14.4 +/-    1.81      20.8 +/-    1.81  0.040 / 0.040
G30     317.2          48.2               11.7 +/-    0.65      15.1 +/-    0.65  0.050 / 0.030