The PACE Spacecraft Housekeeping (HSK) collection contains raw, binary housekeeping telemetry files acquired from the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) spacecraft. These files store time-ordered engineering and health telemetry packets used to monitor spacecraft and instrument status, including power, thermal, attitude, timing, and subsystem state information. The HSK data represent low-level telemetry as received from the spacecraft and are not self-describing; variable definitions, units, and engineering conversions are applied during downstream processing to generate higher-level PACE Housekeeping Telemetry (HKT) products in NetCDF format. This collection is primarily intended for engineering analysis, data quality assessment, mission operations support, and archival completeness rather than direct scientific analysis.