We present techniques for the estimation of stellar atmospheric parameters (T_eff, log~g, [Fe/H]) for stars from the SDSS/SEGUE survey. The atmospheric parameters are derived from the observed medium-resolution (R = 2000) stellar spectra using non-linear regression models trained either on (1) pre-classified observed data or (2) synthetic stellar

EMIR, currently entering into its fabrication and AIV phase, will be one of the first common user instruments for the GTC, the 10 meter telescope under construction by GRANTECAN at the Roque de los Muchachos Observatory (Canary Islands, Spain). EMIR is being built by a Consortium of Spanish and French institutes led by the Instituto de Astrofísica

Elmer is a multi-purpose instrument for the GTC designed for both Imaging and Spectroscopy in the visible range (365 nm-1000 nm). Spectroscopy in Elmer is done by using 2 prisms, 2 grisms, and 6 VPHs as dispersive elements, providing resolving powers of 200, 1000, and 2500, respectively over the whole wavelength range for a 0.6'' slit width.

Elmer is a multi-purpose instrument for the GTC designed for both Imaging and Spectroscopy in the visible range (365-1000 nm). Imaging will be done in a 4.2' circular Field of View (FOV), through standard SDSS broad band filters (g', r', I', and z') as well as narrow band filters (Hα broad, Hα narrow, Hβ, [OI], [OII], [OIII], [SII] broad, and [SII]

EMIR Associate Science Team (EAST) is a scientific group in charge of developing an observing program complementary to that of GOYA, which might serve as a testing bed for all the kinds of science that EMIR can do. Hence EAST puts the emphasis on developing proposals which will exploit the most diverse capabilities of the spectrograph.

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