# 2-D weighted least-squares phase unwrapping

## Abstract

Weighted values of interferometric signals are unwrapped by determining the least squares solution of phase unwrapping for unweighted values of the interferometric signals; and then determining the least squares solution of phase unwrapping for weighted values of the interferometric signals by preconditioned conjugate gradient methods using the unweighted solutions as preconditioning values. An output is provided that is representative of the least squares solution of phase unwrapping for weighted values of the interferometric signals. 6 figs.

- Inventors:

- Issue Date:

- Research Org.:
- AT&T

- OSTI Identifier:
- 63446

- Patent Number(s):
- 5424743

- Application Number:
- PAN: 8-251,988

- Assignee:
- Dept. of Energy, Washington, DC (United States)

- DOE Contract Number:
- AC04-76DP00789

- Resource Type:
- Patent

- Resource Relation:
- Other Information: PBD: 13 Jun 1995

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; INTERFEROMETERS; DATA PROCESSING; LEAST SQUARE FIT; WEIGHTING FUNCTIONS; CALCULATION METHODS

### Citation Formats

```
Ghiglia, D C, and Romero, L A.
```*2-D weighted least-squares phase unwrapping*. United States: N. p., 1995.
Web.

```
Ghiglia, D C, & Romero, L A.
```*2-D weighted least-squares phase unwrapping*. United States.

```
Ghiglia, D C, and Romero, L A. Tue .
"2-D weighted least-squares phase unwrapping". United States.
```

```
@article{osti_63446,
```

title = {2-D weighted least-squares phase unwrapping},

author = {Ghiglia, D C and Romero, L A},

abstractNote = {Weighted values of interferometric signals are unwrapped by determining the least squares solution of phase unwrapping for unweighted values of the interferometric signals; and then determining the least squares solution of phase unwrapping for weighted values of the interferometric signals by preconditioned conjugate gradient methods using the unweighted solutions as preconditioning values. An output is provided that is representative of the least squares solution of phase unwrapping for weighted values of the interferometric signals. 6 figs.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1995},

month = {6}

}