# ISO 21460:2007 — Withdrawn and superseded ISO standards For ISO 21460:2007, item title is Space data and information transfer systems — Proximity-1 space link protocol — Physical layer; status code is 9599; successor is ISO 21460:2015; withdrawn / published date is 2007-10-10, recorded from its source on 2026-08-05. - **Identifier:** ISO 21460:2007 _(verified: appears in the quote below)_ - **Item title:** Space data and information transfer systems — Proximity-1 space link protocol — Physical layer _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 21460:2015 - **Withdrawn / published date:** 2007-10-10 _(verified: appears in the quote below)_ ## What the source says > 44999,IS,,ISO 21460:2007,Space data and information transfer systems — Proximity-1 space link protocol — Physical layer,Systèmes de transfert des informations et données spatiales — Protocole pour liaisons spatiales de proximité 1 — Couche physique,2007-10-10,2,['49.140'],ISO/TC 20/SC 13,9599,[40248],[67092],['en'],35,"

ISO 21460:2007 defines the Proximity-1 space link protocol physical layer. It specifies the channel connection process, provision for frequency bands and assignments, hailing channel, polarization, modulation, data rates, and performance requirements. Currently, the physical layer only defines operations at UHF frequencies for the Mars environment. The coding layer is defin ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).