BackForwardInstrument:  TESIS 

Instrument details
Acronym TESIS
Full name Telescope-spectrometer for imaging solar spectroscopy in X-rays
Purpose Full-disk imaging in the high temperature plasma of the transition region and corona
Short description Full-disk imagery in the spectral bands of X-ray (0.1-1.2 nm, resolution 0.005 nm, and 0.841-0.842 nm, resolution 0.00002 nm/pixel); and EUV (13.1-13.2 nm, resolution 7 nm, and 29.5-31.5 nm, resolution 2 nm), including He-II at 30.4 nm
Background Part of a package of instruments to monitor solar activity
Scanning Technique Sun pointing from a near-polar LEO drifting orbit. Corona view included
Resolution 750 km (EUV) and 2200 km (X-ray) at the Sun surface
Coverage / Cycle Full disk at about 1-s rate
Mass 74 kg Power Data Rate


Providing Agency Roscosmos
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2009 to 2009
Last update: 2017-05-18
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar X-ray spectrometer [from L1, GEO, LEO]
Mission objectives
Primary mission objectives
  • Solar EUV flux spectrum
  • Solar EUV image
  • Solar X-ray flux spectrum
  • Solar X-ray image
Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Solar X-ray flux spectrum*1 - primaryNo specific limitation.High spectral resolution, wide dynamic range, disc and corona view included
Solar X-ray image*2 - very highNo specific limitation.Spectrometry with coarse spatial resolution, corona view included
Solar EUV flux spectrum*4 - fairNo specific limitation.Coarse spectral resolution, moderate dynamic range, solar disc and corona view included
Solar EUV image*1 - primaryNo specific limitation.Spectrometry with high spatial resolution, corona view included
Solar coronagraphic image3 - highNo specific limitation.X-rays (0.12-1200 keV)