A brief summary of the Hinode instruments is given below, with more details available from the links:
Solar Optical Telescope (SOT)
SOT is the first large solar optical telescope flown in space. Its aperture is 50cm and angular
resolution achieved will be 0.25" (175km on the Sun) covering a wavelength range of 480-650nm.
SOT also includes the Focal Plane Package (FPP) vector magnetograph and spectrograph. The vector
magnetograph provides time series of photospheric vector magnetograms, Doppler velocity and
Magnetic lines: Fe I 525.0nm, Fe I 630.2nm, Continuum:524.6nm, Velocity: Fe I 532.4nm
The FPP spectrograph has a spectral resolution of 2.0nm and provides detailed Stokes line profiles
Magnetic sensitivity: B(longitudinal): 1-5G, B(transverse): 30-50G
Temporal resolution: 5 mins
of intensity and polarization.
X-ray Telescope (XRT)
XRT provides coronal images at different temperatures, both full disk and partial fields of view.
Temperature range: 6.1 < log T < 7.5
The XRT provides a flare trigger used by the other instruments.
Temperature discrimination: log T=0.2
Angular resolution: 2"
Temporal resolution: cadence=2s (reduced FOV), exposure time: min=4ms, max=10s
FOV: Full disk (>30 arc min)
The EIS telescope is an off-axis paraboloid design, with focal length 1.9m and mirror diameter 150mm.
EIS has a total length of 3m. Multilayer toroidal gratings disperse the spectrum onto 2 detectors
covering 40A each.
Wavelength range: 170-210A and 250-290 A (the reflectivity of the multilayers restrict the
EIS provides monochromatic images of the transition region and corona at high cadence using
performance below 180A and above 204A)
Angular resolution: 2". Four slit/slot positions are available - 1" slit, 2" slit, 40" slot and 266".
Spectral/Velocity resolution: 3km/s for Doppler velocities, 20km/s for line widths
In spectrosocopy mode: < 1s in dynamic events ~ 10s in active regions
In imaging mode: monochromatic imaging of an active region (~4x4 arc min) in 3s for dynamic events, 10s otherwise.
a slot. High spectral resolution images can be obtained by rastering with a slit.
EIS is able to response to XRT's trigger. In addition it has its own internal triggers - a
flare trigger and a brightpoint trigger. It is also able to use automatic exposure control
for the slots.
Last Revised: 13-Jan-2020
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