@article{tritschler_high-resolution_2002,
	title = {High-resolution solar spectroscopy with {TESOS} - {Upgrade} from a double to a triple system},
	volume = {211},
	issn = {0038-0938},
	url = {https://ui.adsabs.harvard.edu/abs/2002SoPh..211...17T},
	doi = {10.1023/A:1022459132089},
	abstract = {We present the characteristics and demonstrate the performance of the Triple Etalon SOlar Spectrometer (TESOS) operated at the German Vacuum Tower Telescope (VTT) on Tenerife. The Fabry-Pérot interferometer TESOS is ideally suited for precise measurements of photospheric and chromospheric motion. Installed in 1997 and equipped with two etalons, TESOS has recently been completed with a third etalon and upgraded with two high-speed, backside-illuminated CCD cameras. The image scale of 0.089 arc sec pixel−1 is adapted to the resolution of the telescope. The improved system enables frame rates up to 5 frames per second. The spectral resolution of 300 000 allows for spectral diagnostics of weak photospheric lines, including individual CH-lines within the G-band at 430.6 nm.},
	journal = {Solar Physics},
	author = {Tritschler, A. and Schmidt, W. and Langhans, K. and Kentischer, T.},
	month = dec,
	year = {2002},
	keywords = {Frame Rate, Precise Measurement, Spectral Resolution, Spectroscopy, Triple System},
	pages = {17--29},
}

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