Full Name Traceable Radiometry Underpinning Terrestrial- and Helio- Studies (TRUTHS) Status Approved
Mission Agencies ESA, UKSA Launch Date Mar 2030
Mission Links mission site EOL Date Sep 2035
EO Portal Info NORAD Catalog #
International Designator
Orbit Type Inclined, non-sun-synchronous Orbit Period 96.9 minutes
Orbit Sense TBD Orbit Inclination 90 deg
Orbit Altitude 610 km Orbit Longitude
Orbit LST 2023-09-12T11:37:39.024+1000 Repeat Cycle 61 days
Objectives and Applications TRUTHS will provide ultra high accuracy Internation System of Units (SI-traceable) spectrally resolved measurements of incoming and Earth reflected solar radation, globally sampled at 50 m spatial resolution as a benchmark for radiation budget and other climate indicators in the solar reflective domain e.g cloud, Albedo, Land products, Ocean colour, and carbon cycle. Designed explicitly as an operational climate misssion TRUTHS in addition to its own data, provides reference calibration to other optical sensors operating in the spectral range 320 to 2400 nm, including amongst other 'new space' sensors and the future GHG constellation, improving their performance and interoperability. It also provides a radiometeric SI-traceable anchor to existing post-launch calibration infrastructure such as deserts and the Moon. The mission additonally provides spectrally resolved and total solar irradiance measurements for climate and atmosphere/surface interaction studies.
Mission Measurements
AtmosphereRadiation budget CSAR, HIS
Mission Instruments
CSAR - Cryogenic Solar Absolute Radiometer
HIS - Hyperspectral imaging Spectrometer
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