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S. Tomczyk (HAO/NCAR), S. J. Jiménez Reyes (HAO/NCAR, IAC), A. Jiménez, P.L. Pallé (IAC)
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.
The author(s) of this abstract have provided an email address for comments about the abstract: tomczyk@hao.ucar.edu