This Recommended Standard specifies a standard message format to be used in the exchange of spacecraft re-entry information between Space Situational Awareness (SSA) or Space Surveillance and Tracking (SST) data providers, satellite owners/operators, and other parties. These messages can be used to inform spacecraft owners/operators of predicted re-entries or warn civil protection agencies about potential ground impacts.

The current version of this document contains all updates through technical corrigendum 1, dated May 2021.