Bibcode
Tomczyk, S.; Jiménez Reyes, S. J.; Jiménez, A.; Pallé, P. L.
Referencia bibliográfica
American Astronomical Society, SPD Meeting #31, #01.17; Bulletin of the American Astronomical Society, Vol. 32, p.804
Fecha de publicación:
5
2000
Número de citas
0
Número de citas referidas
0
Descripción
The High Altitude Observatory of the National Center for Atmospheric
Research (HAO/NCAR) in collaboration with the Instituto de
Astrofísica de Canarias (IAC) have recently completed a
two-station helioseismic network with sites at Mauna Loa, Hawaii and
Izana, Tenerife. The instruments are Doppler imagers employing
Magneto-Optical filters and are based on the existing LOWL instrument.
We expect the network to provide a duty cycle of 50%, compared to 22%
for the LOWL. In addition, the ECHO incorporates several improvements
over the LOWL including: 1) a CCD detector with square pixels and a
factor of two increase in spatial resolution; 2) better guiding; 3)
exchange of red and blue images every 15 seconds to better facilitate
detector flat fielding; and 4) improved thermal control of the
instrument enclosure. We will present initial data from the network and
demonstrate network performance.