# Spire Lemur-2
*missions*

## Specifications
- **operator**: spire-global
- **current status**: operational
- **orbit type**: Low Earth orbit; WMO OSCAR reports 400-600 km variable orbit heights by launch opportunity, with the Lemur-2 satellite record listing a 550 km sun-synchronous representative orbit.
- **tasking supported**: false
- **current geographic priority**: Global commercial RF sensing for atmospheric profiling, vessel tracking, aircraft tracking, and space-weather observations.
- **launch vehicle**: spacex-transporter
- **entity type**: mission
- **last verified date**: 2026-06-14
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: spire-global
- **attributes**: {"operator":"spire-global","current_status":"operational","orbit_type":"Low Earth orbit; WMO OSCAR reports 400-600 km variable orbit heights by launch opportunity, with the Lemur-2 satellite record listing a 550 km sun-synchronous representative orbit.","tasking_supported":false,"current_geographic_priority":"Global commercial RF sensing for atmospheric profiling, vessel tracking, aircraft tracking, and space-weather observations.","launch_vehicle":"spacex-transporter"}
- **relevance**: in-scope

## Editorial
Spire Lemur-2 (Low Earth Multi-Use Receiver) is a commercial constellation of 3U CubeSats designed, built, and operated by Spire Global. WMO OSCAR records the programme lifetime as 2015-2040 with individual satellite design lives of 2 years, while NASA CSDA lists 3 years for Spire commercial data spacecraft. The constellation flies at variable orbit heights between 400 and 600 km depending on launch opportunity, with a representative 550 km sun-synchronous altitude on the WMO Lemur-2 satellite record. The programme carries three payload types across the constellation: the STRATOS GNSS radio-occultation receiver for atmospheric temperature and humidity profiling, a passive AIS receiver (SENSE) for vessel tracking, and an ADS-B receiver (AirSafe) for aircraft tracking; payload fit varies by flight unit. NASA CSDA identifies Spire as operating over 100 LEMUR satellites collecting RF signals from LEO, with WMO OSCAR recording a constellation capacity of up to 175 flight units.[^wmo-oscar-lemur-programme] The constellation supplies commercial weather and RF-sensing data and provides maritime and aviation domain awareness services globally. [^nasa-csda-spire][^wmo-oscar-lemur-programme][^wmo-oscar-lemur-2][^spire-lemur][^spire-airsafe-launch][^spire-adsb-first-sats]

## Compositional position
- Spire Lemur-2 --[mission_payloads]--> stratos (products)
- Spire Lemur-2 --[mission_payloads]--> sense-ais (products)
- Spire Lemur-2 --[mission_payloads]--> airsafe-ads-b (products)
- Spire Lemur-2 --[related-topic]--> atmospheric-profiling (topics)
- Spire Lemur-2 --[related-topic]--> vessel-tracking (topics)
- Spire Lemur-2 --[related-topic]--> aircraft-tracking (topics)

## Sources
- [nasa-csda-spire] | NASA CSDA vendor page for Spire | https://science.nasa.gov/earth-science/csda/vendor-spire/ | tier=agency-doc | accessed=2026-06-14
- [wmo-oscar-lemur-programme] | WMO OSCAR satellite programme record for Low Earth Multi-Use Receiver | https://space.oscar.wmo.int/satelliteprogrammes/view/lemur | tier=agency-doc | accessed=2026-06-14
- [wmo-oscar-lemur-2] | WMO OSCAR satellite record for Lemur-2 | https://space.oscar.wmo.int/satellites/view/lemur_2 | tier=agency-doc | accessed=2026-06-14
- [spire-lemur] | Spire Low Earth Multi-Use Receiver overview | https://spire.com/spirepedia/low-earth-multi-use-receiver/ | tier=operator-marketing | accessed=2026-06-14
- [spire-airsafe-launch] | Spire announces AirSafe ADS-B aircraft tracking product | https://ir.spire.com/news-events/press-releases/detail/14/spire-announces-airsafe-the-first-ads-b-product-from-spire | tier=operator-press | accessed=2026-06-14 | published=2019-10-16
- [spire-adsb-first-sats] | Spire first ADS-B plane tracking satellites press release | https://d1io3yog0oux5.cloudfront.net/_c5a4b4fd425dd2e15ab09828cd7e717b/spire/news/2018-03-07_Spire_s_First_ADS_B_Plane_Tracking_Satellites_to_34.pdf | tier=operator-press | accessed=2026-06-14 | published=2018-03-07

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Source: https://eo-atlas.org/missions/spire-lemur-2
Maintainer: SpectraWorks B.V. (CC-BY 4.0)