Spektr-UVT
Near the end of the decade the Spektr-UVT spacecraft is tentatively scheduled for launch into a 500 km by 300,000 km orbit with an inclination of 51.5 degrees. However, within eight months perigee will be raised to 40,000 km for the remainder of the 3-year mission. The principal participants in the project are now Canada, Germany, Italy, Russia, and Ukraine with Russia's Institute of Astronomy assuming a lead position. The purpose of the mission is to perform UV including EUV and XUV) observations with a higher fidelity than those of Astron.
The centerpiece instrument for Spektr-UVT will be the T-170 Ritchey-Chretien telescope 912-3,600Å) consisting of a 170 cm (light) diameter primary mirror and a 49 cm (light) diameter mirror in a main housing more than 8 m in length and 2 m in diameter.
The three major focal plane devices are (1) a high resolution dual Echelle spectrograph (1150-3600Å), (2) a medium and low resolution(912-1,200Å and 1,150-3600Å, respectively) Rowland spectrograph, and (3) a direct imaging camera (912-3600Å). Under consideration is the addition of two T-50 (50 cm diameter) and four T-20 (20 cm diameter) EUV/XUV telescopes. One T-50 (T-501) would be used for direct imaging (400-800Å), whereas the other T-50 (T-50S) would be equipped with a low resolution spectrograph (400-1,200Å). The T-20 telescopes would permit narrow band imaging within the range of 100-300Å (Reference 288).
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