# BlackSky x Umbra Satellite Data Partnership revision history

Append-only Arc G field-change log. Forward-only honesty: events accrue from Arc G adoption.

Partnership: [BlackSky x Umbra Satellite Data Partnership](/partnerships/blacksky-x-umbra-satellite-data-partnership.md)

## Recorded posture

- First recorded event: 2026-08-22
- Last material change: 2026-08-22
- Material event count: 1
- Editorial event count: 0

## Forward-only note

Arc G is forward-only. The event log accrues from the Arc G adoption point. Fields with no events post-baseline equal the current cached value and are not independently verified at any prior date.

_Canonical URL: /partnerships/blacksky-x-umbra-satellite-data-partnership/history. REST: /v1/partnerships/d0bdacd9-c636-4916-bc6b-147eb31cb66b/history. HTML: [/partnerships/blacksky-x-umbra-satellite-data-partnership/history](/partnerships/blacksky-x-umbra-satellite-data-partnership/history)._