# CHAMP
*missions*

CHAMP was a German geoscience mission that also produced GNSS radio-occultation atmospheric profiles.

## Specifications
- **operator**: gfz-potsdam
- **entity type**: mission
- **last verified date**: 2026-06-11
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: gfz-potsdam
- **attributes**: {"summary":"CHAMP was a German geoscience mission that also produced GNSS radio-occultation atmospheric profiles.","operator":"gfz-potsdam"}

## Editorial
CHAMP (CHAllenging Minisatellite Payload) was a German geoscience satellite built on the FLEXBUS platform by EADS Astrium GmbH and operated by GFZ Potsdam, with DLR providing launch and systems support.[^eoportal-champ][^gfz-champ-mission] It launched on 15 July 2000 from Plesetsk Cosmodrome on a Kosmos-3M rocket into a near-polar, non-sun-synchronous low Earth orbit at 454 km initial altitude and 87.3 degrees inclination, operating for over ten years before re-entry on 19 September 2010.[^gfz-champ-orbit]

CHAMP carried three primary scientific payloads: the BlackJack dual-frequency GPS receiver (JPL/NASA) for precise orbit determination and GNSS radio occultation atmospheric sounding; the STAR three-axis accelerometer for isolating the gravitational signal from non-gravitational forces; and the MIAS magnetometer assembly combining Overhauser scalar, fluxgate vector, and stellar compass instruments for geomagnetic field mapping.[^eoportal-champ] A laser retroreflector supported ground-based orbit validation and a digital ion drift meter measured ionospheric electric fields.[^eoportal-champ]

The mission produced three types of global observations: static and time-variable gravity field estimates through high-low satellite-to-satellite GPS tracking, global geomagnetic field maps, and atmospheric and ionospheric profiles via GNSS radio occultation.[^gfz-champ-ro] CHAMP was the first mission to demonstrate GPS-based satellite-to-satellite tracking for gravity field mapping from a single low-orbiting satellite, establishing the measurement approach later refined by GRACE, and similarly served as a magnetic-field precursor to Swarm.[^eoportal-champ][^gfz-champ-mission]

## Compositional position
- CHAMP --[successor]--> grace (missions)
- CHAMP --[successor]--> swarm (missions)

## Sources
- [eoportal-champ] | CHAMP mission overview, eoPortal | https://www.eoportal.org/satellite-missions/champ | tier=community | accessed=2026-06-11
- [gfz-champ-mission] | GFZ Satellite Mission CHAMP, GFZ Potsdam | https://www.gfz-potsdam.de/en/champ | tier=operator-engineering | accessed=2026-06-11
- [gfz-champ-orbit] | CHAMP Mission and Orbit, GFZ Potsdam | https://www.gfz-potsdam.de/en/section/geomagnetism/infrastructure/gfz-satellite-mission-champ/mission-orbit | tier=operator-engineering | accessed=2026-06-11
- [gfz-champ-ro] | GPS Radio Occultation with CHAMP, GFZ | https://www.gfz.de/en/section/space-geodetic-techniques/projects/champ-ro | tier=operator-engineering | accessed=2026-06-11

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Source: https://eo-atlas.org/missions/champ
Maintainer: SpectraWorks B.V. (CC-BY 4.0)