Patches_Found Data Series

Feature identification software will identify a small number of solar active region patches using a line-of-sight magnetogram and an intensity image. This data series contains information for each time step during the SDO mission. It provides geometric mapping info and a bitmap image, pointers to the image data, and a number of keywords computed for the patch.

# SERIES INFO

• DATANAME = Patches_Found
• Retention = 20
• Archive = 1
• Primekeys = T_REC, PNUM

# PRIME KEY INFO

• T_REC, TIME, Slotted
• T_REC_STEP = 12MIN
• T_REC_EPOCH = 1976.12.31_23:59:45.000_UTC

• PNUM, INT - One entry for each active region identified at this time step

# GEOMETRY KEYWORDS - PIXEL Info for Bounding Box

• IMAGEX0, INT [x-pixel of center of bounding box]
• IMAGEY0, INT [y-pixel of center of bounding box]
• # Half widths of the bounding box in X and Y directions
• HWIDTH1, INT [Half width of the bounding box, in X-direction, in pixels]
• HWIDTH2, INT [Half width of the bounding box, in Y-direction, in pixels]

# COORDINATE KEYWORDS

• CROTA2, link,"CROTA2",sourcerec
• CTYPE1 = "HPLN_TAN"
• CRPIX1, Reference pixel for array axis-1 [first pixel is: ]
• CRVAL1, The x-coordinate of the reference pixel, in arcsec
• CUNIT1, "arc sec"
• CDELT1, The detector plate scale at the reference pixel [0.5 arcsec/pixel]
• CTYPE2, "HPLT_TAN"
• CRPIX2, Reference pixel for array axis-2 [first pixel is: ]
• CRVAL2, The y-coordinate of the reference pixel, in arcsec
• CUNIT2, "arc sec"
• CDELT2, The detector plate scale at the reference pixel [0.5 arcsec/pixel]

# OTHER KEYWORDS FOR PATCH

• PATCHQUAL, NT

• B0, link, "B0", sourcerec - note - HPLT_TAN - fix?

• ARP_AREA, DOUBLE [Area of the active region]
• I_MIN, FLOAT [Minimum intensity in the patch]
• # OTHER INFO
• DATE, TIME, [date and time the record was last updated, in ISO format]
• COMMENTS, STRING [Description of the data]

# SEGMENT INFO

• data:arp_map, int, vardims, 2, 0, 0, fitz, 0.0, 1.0,"BITMAP of ACTIVE REGION"

#LINK INFO

• link: sourcerec, "HMI.Blos", dynamic
• link: sourceint, "HMI.Ic", dynamic

Related Data Series

• ["HARPDataSeries"]

• VectorPatches