COBE DIRBE Products


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DIRBE PROJECT DATA SETS
DIRBE PROJECT DATA SETS
Product
Download Page		 Description No. Of
Files/Size		 Format Images
Annual Average Sky Maps Average of intensities for all 10 bands over the entire cryogenic mission; 1 file per band. More... 10 files 11 MB each FITS BINTABLE [Image of DIRBE data]
Calibrated Annual File (DCAF) Merged, pixel-ordered, weekly-averaged intensities for cryogenic mission. One file per face of the skycube. More... 6 files ~200 MB each FITS BINTABLE N/A
Calibrated Individual Observations (CIO) 1/8th sec sampled sky survey data listed in pixel order for each day of the cryogenic mission. More... 285 files 60 MB each FITS BINTABLE N/A
CIO Pixel Index Specifies which pixels are covered in each daily CIO file, and which rows in the CIO file contain data for a given pixel. More... 285 files 1 MB each FITS BINTABLE N/A
DCAF Pixel Index Specifies which rows in the DCAF file contain data for each DIRBE pixel, and for which weeks of the mission More... 6 files 1 MB each FITS BINTABLE N/A
e = 90° Sky Maps Intensities for all 10 bands for the special case of e = 90° ; 1 file per band. More... 10 files 13 MB each FITS BINTABLE [Image of DIRBE data]
Galactic Plane Maps Galactic plane subset of e = 90° Sky Maps; Limited to a 6 month interval. More... 1 file 6 MB FITS BINTABLE N/A
Time-Ordered Data Calibrated time-ordered data; 1 file per week of optimized cryogenic operation. More... 40 files 190 MB each Native [Image of DIRBE data]
Weekly Sky Maps Weekly-averaged intensities for 10 bands and Stokes Q and U parameters for 1.25, 2.2, and 3.5 µn bands: 1 file per week. More... 41 files 28 MB each FITS BINTABLE [Image of DIRBE data]

DIRBE ANALYZED SCIENCE DATA SETS
DIRBE ANALYZED SCIENCE DATA SETS
Product
Download Page		 Description No. Of
Files/Size		 Format Images
DIRBE Sky And Zodi Atlas (DSZA) Augmented form of the DCAF; includes a modeled IPD intensity for each week and each wavelength. More... 6 files ~200 MB each FITS BINTABLE N/A
Faint Source Model Predicted contribution to the diffuse sky brightness due to (faint) stars and other discrete galactic sources. Model sky maps at 1.25, 2.2, 3.5, 4.9, 12 and 25 µn. More... 6 files 5 MB each FITS BINTABLE
Photometric Standard Values Names, positions, and photometric data for the 92 objects used to establish the baseline relative celestial calibration system. More... 1 file .01 MB each FITS BINTABLE N/A
Pixel Index to DSZA Analogous to the DCAF pixel index, but for the DSZA. More... 6 files 1 MB each FITS BINTABLE N/A
Solar System Objects Data DIRBE observations of Mars, Jupiter, Saturn, Uranus, Ceres, Palas, and Vesta, including flux density measurements and ancillary data. More... 7 files .05 MB each FITS BINTABLE N/A
Zodi-Subtracted Mission Average Maps (ZSMA) Average sky brightness after removal of the DIRBE IPD model for each of the 10 wavelength bands. More... 10 files 6.3 MB each FITS BINTABLE [Image of DIRBE data]

DIRBE ANCILLARY DATA PRODUCTS
DIRBE ANCILLARY DATA PRODUCTS
Product
Download Page		 Description No. Of
Files/Size		 Format Images
Beam Characteristics Table of beam centroids and solid angles as a function of time. More... 1 file 3.2 KB ASCII N/A
Beam Profiles Effective two-dimensional shape of DIRBE beam for each detector. More... 16 files .5 MB each FITS image N/A
Color Corrections Color correction factors needed in case source spectrum is not vIv = constant. More... 1 file 37 KB ASCII N/A
DIRBE SkyMap Info Documentation of the Quad-Sphere projection at DIRBE resolution. This file does not contain any instrument data. More... 1 file 12 MB FITS BINTABLE N/A
System Responses Normalized system spectral response functions for each wavelength band. More... 1 file 63 KB ASCII N/A
TOD Record Structure Condensed listing of the record structure and contents of the DIRBE Time-Ordered Data. More... 1 file 38 KB ASCII N/A

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A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. David T. Chuss
NASA Official: Dr. David T. Chuss
Web Curator: Michael R. Greason