## Parasitic polarization effects in RATAN-600 solar observations

Transactions of IAA RAS, issue 24, 337–341 (2012)

**Keywords**:
radioastronomy, radio telescope, parasitic circular polarization, the Muller matrix

### Abstract

We report the results of numerical simulation of parasitic circular polarization as observed by RATAN-600 operating in the "Southern Sector with a Flat Reflector" mode. We calculate the two dimensional images of parasite signal which arise in the solar observations. The calculations cover the 2-32 cm range of wavelengths for the focused antenna and in the presence of aberrations. Also we consider the asymmetric antenna irradiation for the good agreement with the observed scans. We estimate the differences between R and L polarization beam pattern of the telescope and compute M11 and M41 for the case of observation of R and L polarization at different points of the focal line. All computations are based on the algorithm of the beam pattern calculation that take into account diffraction in the space between the telescope mirrors. The simulation demonstrates the wide variety of the shape and magnitude of parasitic signal.

### Citation

`L. V. Opeikina, E. K. Majorova, A. N. Korzhavin. Parasitic polarization effects in RATAN-600 solar observations // Transactions of IAA RAS. — 2012. — Issue 24. — P. 337–341.`

```
@article{opeikina2012,
abstract = {We report the results of numerical simulation of parasitic circular polarization as observed by RATAN-600 operating in the "Southern Sector with a Flat Reflector" mode. We calculate the two dimensional images of parasite signal which arise in the solar observations. The calculations cover the 2-32 cm range of wavelengths for the focused antenna and in the presence of aberrations. Also we consider the asymmetric antenna irradiation for the good agreement with the observed scans. We estimate the differences between R and L polarization beam pattern of the telescope and compute M11 and M41 for the case of observation of R and L polarization at different points of the focal line. All computations are based on the algorithm of the beam pattern calculation that take into account diffraction in the space between the telescope mirrors. The simulation demonstrates the wide variety of the shape and magnitude of parasitic signal.},
author = {L.~V. Opeikina and E.~K. Majorova and A.~N. Korzhavin},
issue = {24},
journal = {Transactions of IAA RAS},
keyword = {radioastronomy, radio telescope, parasitic circular polarization, the Muller matrix},
pages = {337--341},
title = {Parasitic polarization effects in RATAN-600 solar observations},
url = {http://iaaras.ru/en/library/paper/876/},
year = {2012}
}
```

```
TY - JOUR
TI - Parasitic polarization effects in RATAN-600 solar observations
AU - Opeikina, L. V.
AU - Majorova, E. K.
AU - Korzhavin, A. N.
PY - 2012
T2 - Transactions of IAA RAS
IS - 24
SP - 337
AB - We report the results of numerical simulation of parasitic circular
polarization as observed by RATAN-600 operating in the "Southern
Sector with a Flat Reflector" mode. We calculate the two dimensional
images of parasite signal which arise in the solar observations. The
calculations cover the 2-32 cm range of wavelengths for the focused
antenna and in the presence of aberrations. Also we consider the
asymmetric antenna irradiation for the good agreement with the
observed scans. We estimate the differences between R and L
polarization beam pattern of the telescope and compute M11 and M41
for the case of observation of R and L polarization at different
points of the focal line. All computations are based on the algorithm
of the beam pattern calculation that take into account diffraction in
the space between the telescope mirrors. The simulation demonstrates
the wide variety of the shape and magnitude of parasitic signal.
UR - http://iaaras.ru/en/library/paper/876/
ER -
```