The ECHO (Experiment for Coordinated Helioseismic Observations) Network

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 autores
4
Número de autores del IAC
1
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.