Variation in Noise - EC1 HCO⁺ Spectra Movie

This movie shows how the noise varied during 372 minutes of observing HCO⁺ in Edge Cloud 1 (EC1) at the Onsala 20m telescope in May 2005. Note how the system temperature (Tsys), and hence noise, changed as the weather improved or deteriorated.

(QuickTime required to play MP4 movie - file size 1.9MB)

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