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
- SERIESNAME = 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 [original CRPIX1 - x_offset (lower left corner of the bounding box) ]
- 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 [ original CRPIX2 - y_offset (lower left corner of the bounding box)]
- 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