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1990 – 1999
- 1998
[j7]Eric Sutton, Helen Na:
Time-varying reconstruction of the ionosphere. 1. The algorithm. Int. J. Imaging Syst. Technol. 9(6): 484-490 (1998)- [j6]Eric Sutton, Helen Na:
Time-varying reconstruction of the ionosphere. 2. Data source analysis. Int. J. Imaging Syst. Technol. 9(6): 491-499 (1998) - 1997
- [c8]Chaitali Biswas, Helen Na:
Limited Angle Tomography Using Volumetric Constraints. ICIP (1) 1997: 488-491 - 1996
- [j5]Eric Sutton, Helen Na:
A block iterative algorithm for tomographic reconstruction of ionospheric electron density. Int. J. Imaging Syst. Technol. 7(3): 238-245 (1996) - [c7]Eric Sutton, Helen Na:
Static tomographic reconstruction of the time varying ionosphere. ICIP (3) 1996: 523-526 - 1995
- [c6]B. Hall, Helen Na:
Measures of information content for computerized ionospheric tomography. ICIP 1995: 433-436 - [c5]Eric Sutton, Helen Na:
A new iterative algorithm for ionospheric tomography. ICIP 1995: 437-440 - 1994
- [j4]Eric Sutton, Helen Na:
Orthogonal decomposition framework for ionospheric tomography algorithms. Int. J. Imaging Syst. Technol. 5(2): 106-111 (1994) - [j3]Helen Na, Eric Sutton:
Resolution analysis of ionospheric tomography systems. Int. J. Imaging Syst. Technol. 5(2): 169-173 (1994) - [c4]Eric Sutton, Helen Na:
High Resolution Ionospheric Tomography Through Orthogonal Decomposition. ICIP (2) 1994: 148-152 - [c3]Helen Na, Chaitali Biswas:
A Space-Frequency Algorithm for Limited Anlge Tomography. ICIP (2) 1994: 815-819 - 1992
- [c2]Helen Na, Hua Lee:
Analysis of fundamental resolution limit of ionospheric tomography. ICASSP 1992: 97-100 - 1991
- [b1]Helen Na:
Fundamental analysis of the tomographic imaging system for reconstructing ionospheric distributions. University of Illinois Urbana-Champaign, USA, 1991 - [j2]Helen Na, Hua Lee:
Orthogonal decomposition technique for ionospheric tomography. Int. J. Imaging Syst. Technol. 3(4): 354-365 (1991) - 1990
- [j1]Helen Na, Hua Lee:
Resolution analysis of tomographic reconstruction of electron density profiles in the Ionosphere. Int. J. Imaging Syst. Technol. 2(3): 209-218 (1990)
1980 – 1989
- 1988
- [c1]Helen Na, Stephen C. Glinski:
Neural net based pattern recognition on the graph search machine. ICASSP 1988: 2168-2171
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