ECCS Frequency Response Subsystem Requirement

Could you please elaborate what you mean by frequency response requirements? Do you need random vibration or sine vibration input curves?

I don't understand why you'd be looking for spacecraft frequency response requirements in a methodology handbook:

The ECSS-E-HB-32-26 “Spacecraft Mechanical Loads Analysis Handbook” has been developed with the aim to harmonize methodologies, procedures and practices currently applied for the conduct of spacecraft and payloads loads analysis.

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Moreover, such requirements are typically derived from launch vehicle environmental specifications and flight environments, including self-induced environments.

TTFN (ta ta for now)
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