BackForward Satellite: Lemur-2 

Satellite details
Acronym Lemur-2
Full name Low Earth Multi-Use Receiver - 2
Satellite Description
  • Constellation of nano-satellites (3U CubeSat), designed for maintaining up to 175 flight units.
  • Orbit heights ranging from 400 to 600 km, and various orbit inclinations, depending on the launch of opportunity.
  • Main missions: radio occultation sounding and ship tracking.
  • Substantial contribution to Space weather.
Mass at launch 4.6 kg Dry mass
Data access link no link provided
Data access information
  • Data commercially available from Spire Global Inc., San Francisco, CA, USA.
Orbit Sunsynchronous orbit Altitude 550 km


Space agency SPIRE
Status Operational
Details on Status
(as available)
  • 119 flight units launched as of 03 September 2020.
  • 123 flight units launched as of 28 September 2020.
  • 125 flight units launched as of 03 October 2020.
  • 129 flight units launched as of 07 November 2020.
  • 137 flight units launched as of 24 January 2021.
  • 139 flight units launched as of 29 April 2021.
Launch 28 Sep 2015 EOL ≥2040
Last update: 2021-04-29
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on Lemur-2

Acronym Full name
Show instrument status and calibration