1. International Deep Space Interoperability Standards - https://www.internationaldeepspacestandards.com/

1.1. International Environmental Control and Life Support System Interoperability Standards (IECLSSIS)

The purpose of the IECLSSIS is to provide common basic performance parameters based on applicable, internationally recognized standards to allow developers to independently develop Environmental Control and Life Support System (ECLSS) technology solutions which can be easily compared and seamlessly integrated. They address areas covering cabin atmospheric conditions, potable water supply, urine stabilization, and special technical areas associated with ECLSS process technology or component compatibility. The focus of this version of the document is on cislunar space missions, including cislunar space platforms and their interfaces, with content that is also relevant to future missions. Extensibility to other deep space missions has also been considered and where practicable the documents include content that is also relevant to future missions. Future revisions of the document will incorporate additional deep space missions.

https://internationaldeepspacestandards.com/wp-content/uploads/2024/02/eclss_baseline_final_3-2019.pdf

1.2. International Thermal System Interoperability Standards (ITSIS)

All spacecraft require a thermal management system to maintain a tolerable thermal environment for the spacecraft crew and/or equipment. The purpose of this document is to state standards for when common fluids are employed in active external and internal coolant loops and agreed-to requirements for coldplates that interface directly to those coolant loops. Future revisions of the document will incorporate any additional content for deep space missions that is not already included. This standard supports reliability and commonality for cooling systems that work across elements, when there is agreement to utilize common coolant(s). This document also provides basic, common design parameters to allow developers to independently develop and/or provide compatible coldplates.

https://internationaldeepspacestandards.com/wp-content/uploads/2024/02/thermal_baseline_final_8-2019.pdf