Hα Full-Disk Observation
Observations are performed with the Solar Flare Telescope at the NAOJ Mitaka campus.
Real-time Image
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The image orientation is the Sun‘s north at the top and west to the right (Click the images to enlarge). The images are automatically reloaded in every 2.5 minutes.
Hα fulldisk
Hα±0.5Å fulldisk
Hα±0.8Å fulldisk
Hα+3.5Å fulldisk
Hα±0.5Å Doppler
Hα±0.8Å Doppler
Database Calendar
- Database Calendar
- Latest Hα image
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Archived Hα image
2010
Full-Disk Images (jpg file. 512×512, 1024×1024, and 2048×2048 pixels)
The image orientation is the Sun‘s north at the top and west to the right (Click the images to enlarge). The images are automatically reloaded in every 2.5 minutes.
 Hα fulldisk |
 Hα±0.5Å fulldisk |
 Hα±0.8Å fulldisk |
 Hα+3.5Å fulldisk |
 Hα±0.5Å Doppler |
 Hα±0.8Å Doppler |
| Archived Hα image | |||||||||
| 2010 | |||||||||
The image orientation is the Sun’s north at the top and west to the right.
Names of data files are
“mtk_ft_ha_fd_{YYYYMMDD}N{nnnn}_{i, vl}_{000, 050, 080, 350}_{l, m, s}_mov.jpg”
for color images of 512×512 pixels used in an MPEG movie,
“mtk_ft_ha_fd_{YYYYMMDD}T{hhmmss}_i_{000, 05b, 05r, 08b, 08r, 35r}_{l, m, s}.jpg”
for monochrome images of 1024×1024 pixels as raw images, and
“mtk_ft_ha_fd_{YYYYMMDD}T{hhmmss}_{i, vl}_{000, 050, 080, 350}_{m, s}_today.jpg”
for color and monochrome images of 2048×2048 pixels (the best resolution in our observations) in the ‘today’ directory.
Each word and its meaning in the names above is as follows;
- {YYYYMMDD}: Date (UT). The YYYY for year, MM for month, and DD for day (in integer).
- {nnnn}: Four-digit serial number.
- {hhmmss}: Time (UT). The hh for hour, mm for minute, and ss for second.
- {i, vl}: Types of images. The i for the intensity and vl for the velocity.
- {000,050,080,350}: The wave-length for an image in an MPEG. The 000, 050, 080, and 350 mean Hα center(6563 Å), Hα±0.5 Å, Hα±0.8 Å, and Hα+3.5 Å, respectively.
- {000, 05b, 05r, 08b, 08r, 35r}: The wave-length for a raw image. The 000 for Hα center, 05b for Hα-0.5 Å, 05r for Hα+0.5 Å, 08b for Hα-0.8 Å, 08r for Hα+0.8 Å, and 35r for Hα+3.5 Å.
- {l, m, s}: Classification of an exposure time. The l for long, m for medium, and s for short.
Full-Disk Movies (MPEG and Javascript. 512×512 pixels)
We have MPEG movies to download and watch, and Javascript movies to watch on the website. Names of files are
“mtk_ft_ha_fd_{YYYYMMDD}_{i, vl}_{000, 050, 080, 350}_{l, m, s}.mpeg”
and
“mtk_ft_ha_fd_{YYYYMMDD}_{i, vl}_{000, 050}_{l, m, s}_jsmovie.html”,
respectively. The explanations of {YYYYMMDD}, {i, vl}, {000, 050, 080, 350}, and {l, m, s} are found in the Full-Disk Images (jpg file) table above.
Full-Disk Images (FITS-format data)
Files are named as
“mtk_ft_ha_fd_{YYYYMMDD}T{hhmmss}_i_{000, 05b, 05r, 08b, 08r, 35r}_{l, m, s}.fts.gz”.
The explanations of {YYYYMMDD}, {hhmmss}, {000, 05b, 05r, 08b, 08r, 35r}, and {l, m, s} are found in the Full-Disk Images (jpg file) table above.
The Dark/flat correction, P-angle correction, and centering of the disk were applied.