We are developing a new etalon-based spectrometer 'HELLRIDE' for the Vacuum Tower Telescope (VTT), Tenerife. It
will offer improved performance over existing devices in a number of operational aspects. Primary development goal has
been increasing the number of spectral lines for the simultaneous recording of solar Doppler shifts. Observations may
cover a large field-of-view at high spatial and temporal resolution. New electromagnetic drive technologies are to be
implemented. A focus will be set to achieve thermal stability with respect to spectroscopic drifts and pointing precision.
All aspects of device operation are to be covered by a numerical model allowing for offline testing and offline
observations simulation. Remote operation options will be available for dedicated observational programs.
The new instrument is foreseen to be used for the analysis of energy transfers within the solar atmosphere. The
helioseismological and kinetic aspects of chromospheric and coronal heating are here of special interest. To allow for
synchronized observations of photospheric and coronal phenomena new procedures are under development to improve
co-alignment of ground-based and space-based telescopes.
HELLRIDE stands for HELioseismological Large Regions Interferometric DEvice.
We are currently developing network based tools for the Vacuum Tower Telescope (VTT), Tenerife which will allow to
operate the telescope together with the newly developed 2D-spectrometer HELLRIDE under remote control conditions.
The computational configuration can be viewed as a distributed system linking hardware components of various
functionality from different locations. We have developed a communication protocol which is basically an extension of
the HTTP standard. It will serve as a carrier for command- and data-transfers.
The server-client software is based on Berkley-Unix sockets in a C++ programming environment. A customized CMS
will allow to create browser accessible information on-the-fly. Java-based applet pages have been tested as optional user
access GUI's. An access tool has been implemented to download near-realtime, web-based target information from
Latency tests have been carried out at the VTT and the Swedish STT at La Palma for concept verification. Short
response times indicate that under favorable network conditions remote interactive telescope handling may be possible.
The scientific focus of possible future remote operations will be set on the helioseismology of the solar atmosphere, the
monitoring of flares and the footpoint analysis of coronal loops and chromospheric events.