PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-18:58:10
G07     306.9          48.2               12.3 +/-    2.12      15.9 +/-    2.12  0.160 / 0.100
G08     129.5          38.1               16.4 +/-    1.59      24.6 +/-    1.59  0.150 / 0.080
G09     312.8          74.4               12.1 +/-    0.30      12.5 +/-    0.30  0.040 / 0.020
G16     41.9           32.8               10.1 +/-    1.30      16.7 +/-    1.30  0.040 / 0.030
G23     140.5          69.2               13.2 +/-    0.82      14.0 +/-    0.82  0.060 / 0.060
G27     87.3           37.5               12.8 +/-    0.78      19.4 +/-    0.78  0.050 / 0.050
G30     283.0          20.1               12.6 +/-    1.14      27.7 +/-    1.14  0.050 / 0.090