PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-19:27:50
G07     324.0          55.3               13.1 +/-    0.70      15.5 +/-    0.70  0.050 / 0.050
G08     113.8          47.0               16.0 +/-    0.82      21.0 +/-    0.82  0.040 / 0.050
G09     244.4          82.9               12.4 +/-    1.09      12.5 +/-    1.09  0.030 / 0.030
G16     43.3           20.9               10.9 +/-    2.26      23.5 +/-    2.26  0.030 / 0.030
G23     151.2          54.9               15.0 +/-    0.52      17.9 +/-    0.52  0.060 / 0.060
G27     69.7           37.2               12.7 +/-    1.24      19.4 +/-    1.24  0.130 / 0.220
G28     228.7          16.9               15.6 +/-    2.23      37.0 +/-    2.23  0.170 / 0.250
G30     293.3          28.3               11.9 +/-    1.87      21.7 +/-    1.87  0.180 / 0.260