PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-18:27:30
G07     315.2          51.9               12.0 +/-    0.80      14.8 +/-    0.80  0.060 / 0.050
G08     123.0          42.7               13.7 +/-    0.66      19.1 +/-    0.66  0.040 / 0.050
G09     295.9          80.0               12.9 +/-    0.58      13.1 +/-    0.58  0.030 / 0.030
G16     42.2           26.6                7.8 +/-    2.57      14.8 +/-    2.57  0.040 / 0.030
G23     146.6          62.0               13.9 +/-    0.44      15.5 +/-    0.44  0.050 / 0.070
G27     78.5           37.9               11.2 +/-    0.77      16.9 +/-    0.77  0.070 / 0.070
G30     288.1          24.3               10.8 +/-    1.52      21.5 +/-    1.52  0.120 / 0.160