Computer Science – Performance
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9401t&link_type=abstract
American Astronomical Society Meeting 210, #94.01; Bulletin of the American Astronomical Society, Vol. 39, p.217
Computer Science
Performance
2
Scientific paper
The Hinode (Solar B) satellite includes the Solar Optical Telescope (SOT) with its 50 cm diameter Optical Telescope Assembly (OTA) and Focal Plane Package (FPP), for near UV and visible observations of the photosphere and chromosphere at very high (diffraction limited) angular resolution. The FPP has a Spectropolarimeter (SP) for precision measurements of photospheric vector magnetic fields over a 160 x 320 arcsecond field of view; a Narrowband Filter Imager (NFI) with a tunable birefringent filter for magnetic, Doppler, and intensity maps over the same field of view; and a Broadband Filter Imager (BFI) for highest resolution images in six wavelengths (G band, Ca II H, continua, etc.) over two thirds of that field of view. A polarization modulator in the telescope allows measurement of Stokes parameters at all wavelengths in the SP and NFI. This poster gives examples of SOT observables from the performance verification and initial observing phases of the mission. The SP routinely collects Stokes profiles with spatial resolution 0.16 arc seconds (pixel) and rms noise less than 0.001. Initially the NFI only made magnetograms in Fe I 6302.5 with rms noise less than 0.002; more recently it has begun to observe the other photospheric and chromospheric lines available. The BFI movies have unprecedented uniformity and stability for such high spatial resolution; cadence can be 4 seconds or less. All images are stabilized to 0.01 arc seconds by a tip tilt mirror and correlation tracker. The process for requesting Hinode observations is described, along with guidelines for SOT observing programs. Starting in May, 2007, the Hinode data policy becomes completely open, with all data available to the community immediately after receipt and reformatting at ISAS.
Hinode is an international cooperative mission between JAXA/ISAS of Japan, NASA of the United States, PPARC of the United Kingdom, and ESA.
SOT Team
Tarbell Theodore D.
Tsuneta Saku
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