Issue |
Astron. Astrophys. Suppl. Ser.
Volume 127, Number 3, February I 1998
|
|
---|---|---|
Page(s) | 555 - 567 | |
DOI | https://doi.org/10.1051/aas:1998119 | |
Published online | 15 February 1998 |
Analysis of the accuracy of a destriping method for future cosmic microwave background mapping with the PLANCK SURVEYOR satellite
1
Institut d'Astrophysique Spatiale, CNRS & Université Paris XI, Bât. 121, 91405 Orsay Cedex, France
2
Enrico Fermi Institute, University of Chicago, 5460 South Ellis Avenue, Chicago, IL 60510, U.S.A.
Corresponding author: Send offprint request to: J. Delabrouille jacques@ias.fr
Received:
20
March
1997
Accepted:
9
May
1997
A major problem in cosmic microwave background radiation (CMBR) anisotropy
measurements is the presence of low-frequency noise in the data streams.
This noise arises from thermal instabilities of optical elements or of the
thermal bath, gain instabilities and noise in
the electronics, and other poorly understood
processes.
If improperly monitored or processed, this excess low-frequency noise might
lead to striping in the maps, compromising the success of the experiment.
In this paper, we show that a simple destriping method
will clean the maps obtained with the High Frequency Instrument of the
PLANCK SURVEYOR mission of
any significant additional noise from low-frequency drifts, provided that the
knee frequency of the low frequency noise
is less
than the spinning
frequency of the satellite, i.e.
.
For the High Frequency Instrument of PLANCK, the nominal knee frequency
of the noise is
or less, and thus no
significant striping nor increase of the noise rms is expected
due to low-frequency drifts.
In addition, we show that even if the knee frequency of the low frequency
noise were somewhat higher than the spinning frequency of the satellite
one could estimate and remove the striping with a excellent accuracy.
Key words: methods: data analysis / cosmology: cosmic microwave background / space vehicles
© European Southern Observatory (ESO), 1998