ALMA Solar Ephemeris Generator
Notice to users
Solar Dynamics Observatory (SDO) sometimes has an on-orbit tests. During tests the roll angle of SDO vary from 0 to 180 degrees. Near-realtime images from SDO may appear with the incorrect position angle, similar to what happens during instrument calibration.
It is possible that ALMA Solar Ephemeris GUI interface doesn't work as expected with SDO/AIA images during that period, so please use it with caution and double-check your coordinates with other tools (e.g.
Helioviewer or SolarMonitor). However, the text interface should not be affected by this issue.
Select user interface
GUI (by clicking on the solar image)
Text (manual input of coordinates)
Input FITS file
AIA image (local)
AIA synoptic 94 (latest)
AIA synoptic 131 (latest)
AIA synoptic 171 (latest)
AIA synoptic 193 (latest)
AIA synoptic 211 (latest)
AIA synoptic 304 (latest)
AIA synoptic 335 (latest)
AIA synoptic 1600 (latest)
AIA synoptic 1700 (latest)
AIA synoptic 4500 (latest)
AIA image (for testing)
Size: - x -
Format: - View header
> of 0.
Show ALMA 12m beam size
cursor (wcs) = (-, -), intensity = -
HPC Y: arcsec
Sun distance: m
Get from JPL Horizons
Estimated min. no. of pointings for ALMA 12m array is 1 (single pointing).
Show original JPL file
Show ephemeris table
Download table data
Please read the
User Manual. Notes
Coordinates of the Sun are astrometric J2000 coordinates from JPL Horizons for the ALMA center of array. Atmospheric refraction is not taken into account.
Physical ephemeris of the Sun are also from JPL Horizons.
http://www.eso.org Czech ARC node Ondřejov,
http://www.asu.cas.cz/alma AIA synoptic images courtesy of NASA/SDO and the AIA, EVE, and HMI science teams.
https://github.com/slowe/jsFITS JPL Horizons,
http://ssd.jpl.nasa.gov/horizons.cgi Joint Science Operations Center (JSOC),
http://jsoc.stanford.edu Hvar Observatory,
http://oh.geof.unizg.hr Kanzelhöhe Observatory,
Special thanks to the members of the ALMA Solar Development Team for comments, improvement suggestions and testing.
Brajša, R.; Vršnak, B.; Ruždjak, V.; Schroll, A.; Pohjolainen, S. (1991) Solar differential rotation determined by polar crown filaments. SoPh, 133, p. 195-203.(
ADS) Sudar, D.; Skokić, I.; Ruždjak, D.; Brajša, R.; Wöhl, H. (2014) Tracing sunspot groups to determine angular momentum transfer on the Sun. MNRAS, 439-3, p. 2377-2385.(
ADS) Thompson, W. T. (2006) Coordinate systems for solar image data. A&A, 449-2, p. 791-803.(
ADS) Wöhl, H.; Brajša, R.; Hanslmeier, A.; Gissot, S. F. (2010) A precise measurement of the solar differential rotation by tracing small bright coronal structures in SOHO-EIT images. Results and comparisons for the period 1998-2006. A&A, 520-A29.(
Astronomical Institute of the Czech Academy of Sciences Fričova 298, 251 65 Ondřejov, Czech Republic