Higher-degree reference field in the generalized Stokes-Helmert scheme for geoid computation

1995 ◽  
Vol 70 (3) ◽  
pp. 176-182 ◽  
Author(s):  
Petr Vaníček ◽  
Mehdi Najafi ◽  
Zdeněk Martinec ◽  
Lars Harrie ◽  
Lars E. Sjöberg
Keyword(s):  
Reference Field ◽  
Geoid Computation

scholarly journals The 10th generation international geomagnetic reference field

2005 ◽  
Vol 151 (3-4) ◽  
pp. 320-322 ◽  
Author(s):  
S. Maus ◽  
S. Macmillan ◽  
T. Chernova ◽  
S. Choi ◽  
D. Dater ◽  
...  
Keyword(s):  
Reference Field ◽  
International Geomagnetic Reference Field ◽  
International Geomagnetic Reference

Time-resolved spectrometry for the characterization of a reference field for pulsed radiation

2012 ◽  
Vol 7 (10) ◽  
pp. T10002-T10002
Author(s):  
P Sievers ◽  
J Klammer ◽  
O Hupe ◽  
T Michel ◽  
G Anton
Keyword(s):  
Reference Field ◽  
Time Resolved

Holographic Multiplication in One Exposure by the Use of a Multibeam Reference Field

1973 ◽  
Vol 12 (8) ◽  
pp. 1946 ◽  
Author(s):  
A. Kalestynski
Keyword(s):  
Reference Field

scholarly journals The 9th-Generation International Geomagnetic Reference Field

2003 ◽  
Vol 155 (3) ◽  
pp. 1051-1056 ◽  
Author(s):  
◽  
S. Macmillan ◽  
S. Maus ◽  
T. Bondar ◽  
A. Chambodut ◽  
...  
Keyword(s):  
Reference Field ◽  
International Geomagnetic Reference Field ◽  
International Geomagnetic Reference

Phase-shifting digital holography with an unknown reference beam

2021 ◽  
Author(s):  
Roghayeh Yazdani ◽  
Hamidreza Fallah
Keyword(s):  
Digital Holography ◽  
Phase Retrieval ◽  
Reference Beam ◽  
Phase Shifting ◽  
Retrieval Algorithm ◽  
Reference Field ◽  
Digital Holograms ◽  
Noisy Conditions ◽  
Phase Retrieval Algorithm

In digital holography, errors of the reference field degrade the quality of the reconstructed object field. In this paper, we propose an effective method in phase-shifting digital holography in which the reference field does not need to be known and perfect. The unknown complex amplitudes of both reference and object fields are derived simultaneously. The method employs only five digital holograms and a single execution of a phase retrieval algorithm. So, the required measurements and algorithm executions in this method are fewer than those in other methods; it suggests a simpler and faster method. The effectiveness of the suggested method is indicated by simulation, under noise-free and noisy conditions. Moreover, the capability of the method to extract full information about the phase singularities in both fields is demonstrated.

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