Ultra-High Resolution Observations of the Upper Chromosphere: First Results From the NRL VAULT Sounding Rocket Payload

Computer Science – Sound

Scientific paper

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7507 Chromosphere, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques

Scientific paper

The Very high resolution Advanced ULtraviolet Telescope (VAULT) is a new spectroscopic imaging instrument. The instrument was launched on May 7, 1999 as a sounding rocket payload. The goal of the first VAULT flight was to obtain sub-arcsecond images of the Sun in the light of Lya (1216 Å). VAULT directly imaged an active region plage, fliaments and the fine structures in the supergranule boundaries and network with the unprecented spatial resolution of 0.33 arcseconds. We present the VAULT images and the first results from the comparison of the Lya data to observations from other instruments and in particular with a sequence of TRACE 171 Å images taken during the VAULT flight.

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