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

• IMAGEX0, INT [x-pixel of left edge of bounding box]
• IMAGEY0, INT [y-pixel of lower edge of bounding box]
• # other corner of bounding box computed from segment dimensions
• IMAGEX1, INT [x-pixel of right edge of bounding box]
• IMAGEY1, INT [y-pixel of upper edge of bounding box]

# COORDINATE KEYWORDS

• CROTA2 = link,"CROTA2",sourcerec
• CTYPE1 = "hpln_tan"
• CRPIX1 = 1
• CRVAL1 = [left corner of bounding box]
• CUNIT1 = "arc sec"
• CDELT1 = 0.5 [nominal HMI pixel]
• CTYPE2 = "hplt_tan"
• CRPIX2 = 1
• CRVAL2 = [lower corner of bounding box]
• CUNIT2 = "arc sec"
• CDELT2 = 0.5 [nominal HMI pixel]

# OTHER KEYWORDS FOR PATCH

• QUALITY = INT
• B0, link, "B0", sourcerec
• ARP_AREA, DOUBLE
• I_MIN, FLOAT
• # OTHER INFO

# SEGMENT INFO

• data:arp_map, char, vardims, 2, 100, 100, fitz, 0, 1,"TXT" - BITMAP of ACTIVE REGION

#LINK INFO

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

Related Data Series

• [wiki:HARPDataSeries HARPDataSeries]

• VectorPatches