Helen Na

According to our database, Helen Na authored at least 16 papers between 1988 and 1998.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

1998

Time-varying reconstruction of the ionosphere. 2. Data source analysis.

Eric Sutton, Helen Na

Int. J. Imaging Syst. Technol., 1998

Time-varying reconstruction of the ionosphere. 1. The algorithm.

Eric Sutton, Helen Na

Int. J. Imaging Syst. Technol., 1998

1997

Limited Angle Tomography Using Volumetric Constraints.

Chaitali Biswas, Helen Na

Proceedings of the Proceedings 1997 International Conference on Image Processing, 1997

1996

A block iterative algorithm for tomographic reconstruction of ionospheric electron density.

Eric Sutton, Helen Na

Int. J. Imaging Syst. Technol., 1996

Static tomographic reconstruction of the time varying ionosphere.

Eric Sutton, Helen Na

Proceedings of the Proceedings 1996 International Conference on Image Processing, 1996

1995

A new iterative algorithm for ionospheric tomography.

Eric Sutton, Helen Na

Proceedings of the Proceedings 1995 International Conference on Image Processing, 1995

Measures of information content for computerized ionospheric tomography.

B. Hall, Helen Na

Proceedings of the Proceedings 1995 International Conference on Image Processing, 1995

1994

Orthogonal decomposition framework for ionospheric tomography algorithms.

Eric Sutton, Helen Na

Int. J. Imaging Syst. Technol., 1994

Resolution analysis of ionospheric tomography systems.

Helen Na, Eric Sutton

Int. J. Imaging Syst. Technol., 1994

High Resolution Ionospheric Tomography Through Orthogonal Decomposition.

Eric Sutton, Helen Na

Proceedings of the Proceedings 1994 International Conference on Image Processing, 1994

A Space-Frequency Algorithm for Limited Anlge Tomography.

Helen Na, Chaitali Biswas

Proceedings of the Proceedings 1994 International Conference on Image Processing, 1994

1992

Analysis of fundamental resolution limit of ionospheric tomography.

Helen Na, Hua Lee

Proceedings of the 1992 IEEE International Conference on Acoustics, 1992

1991

Fundamental analysis of the tomographic imaging system for reconstructing ionospheric distributions

Helen Na

PhD thesis, 1991

Orthogonal decomposition technique for ionospheric tomography.

Helen Na, Hua Lee

Int. J. Imaging Syst. Technol., 1991

1990

Resolution analysis of tomographic reconstruction of electron density profiles in the Ionosphere.

Helen Na, Hua Lee

Int. J. Imaging Syst. Technol., 1990

1988

Neural net based pattern recognition on the graph search machine.

Helen Na, Stephen C. Glinski

Proceedings of the IEEE International Conference on Acoustics, 1988