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Instrument details
Acronym
SECCHI/HI-2
Full name
SECCHI / Heliospheric Imager 2
Purpose
Extention of the observation of the K-corona, the F-corona and of Coronal Mass Ejections (CMEs) to the external heliosphere
Short description
Externally occulted Lyot coronagraph, companion of HI-1 for areas in the inner heliosphere. Bandpass 450-750 nm, 50 white light images, 21 mm aperture telescope
Background
Part of the package "SECCHI" (Sun-Earth Connection Coronal and Heliospheric Investigation)
Scanning Technique
Array of 2048x2048 detectors binned in 1024x1024. The Sun is observed by two STEREO satellites moving in the plan of Ecliptic with different viewing conditions, so as to implement stereoscopy. Corona view included
Resolution
350,000 km at the Sun surface
Coverage / Cycle
Full Sun disk each 102 min
Mass
Power
Data Rate
Providing Agency
NRL
Instrument Maturity
Flown on an R&D satellite
Utilization Period:
2007-01-21 to 2014-10-01
Last update:
2021-12-04
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 Heliospheric imager [from solar orbit, ecliptic, L5]
Mission objectives
Tentative 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
Variable Relevance for measuring this variable Operational limitations Explanation
Heliospheric image 1 - primary No specific limitation. VIS Solar heliospheric imager
Instrument: SECCHI/HI-2