CEOS EO HANDBOOK – MISSION SUMMARY - OSM-1 CICERO -
Full Name Orbital Solutions Monaco 1 Community Initiative for Continuing Earth Radio Occultation Status Operational (nominal)
Mission Agencies GeoOptics Launch Date 02 Sep 2020
Mission Links EOL Date Dec 2025
EO Portal Info NORAD Catalog #
International Designator
Orbit Type Sun-synchronous Orbit Period
Orbit Sense Orbit Inclination 97.52 deg
Orbit Altitude 537 km Orbit Longitude
Orbit LST Repeat Cycle
Objectives and Applications CICERO satellites host CION instruments (CICERO Instrument for GNSS-RO) which perform GNSS-RO by sensing radio signals broadcast by GNSS satellites (GPS and Galileo) and measuring the phase delay due to refraction during occultation. Second-generation CICERO-2 satellites (two launched in 2022) carry an improved CION instrument, CION-2, which measures reflected signals from the sea surface and has a polarimetric capability, in addition to GNSS-RO. CION and CION-2 data produce high-accuracy profiles of atmospheric pressure, temperature, and moisture; 3D maps of the electron distribution in the ionosphere; and information on ocean and ice properties.
Mission Measurements
Mission Instruments
OpenSearch Datasets No IDN OpenSearch datasets found.

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