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community [2022/02/17 07:37]
ahughes 		community [2023/01/31 10:22] (current)
Déborah Paradis
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-======CADE ​Community & FAQ======+======CADE FAQ & Community====== 
 + 
 +==== CADE Users' Survey (closed)==== 
 + 
 +Your opinion helps us to improve CADE! Please take our short (10-minute) [[https://​framaforms.org/​cade-users-survey-1645440279 | CADE Users' Survey]].
  
 ==== CADE Mailing List ==== ==== CADE Mailing List ====
  
-If you use CADE data, please join our mailing list! The purpose of the list is to regularly update users with CADE news, and to receive user feedback and suggestions. Your input helps us to extend and improve the CADE database of maps and tools.  ​+If you use CADE data, please join our mailing list. The purpose of the list is to regularly update users with CADE news, and to receive user feedback and suggestions. Your input helps us to extend and improve the CADE database of maps and tools.  ​
  
 Please contact us at [[cade@irap.omp.eu|cade@irap.omp.eu]] if you would like to be added to our mailing list. Please contact us at [[cade@irap.omp.eu|cade@irap.omp.eu]] if you would like to be added to our mailing list.
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 The original angular resolution of the surveys is determined by the instrument, and is noted on the individual survey pages. ​ Some maps in the CADE database have been smoothed to a lower angular resolution, following the process described on the individual survey pages. The final angular resolution of the distributed CADE maps is included in the FITS header using the BMAJ/BMIN keywords. The original angular resolution of the surveys is determined by the instrument, and is noted on the individual survey pages. ​ Some maps in the CADE database have been smoothed to a lower angular resolution, following the process described on the individual survey pages. The final angular resolution of the distributed CADE maps is included in the FITS header using the BMAJ/BMIN keywords.
  
-The NSIDE of a Healpix map determines the pixelisation scheme and hence the pixel size. At CADE, we aim for a pixelisation scheme such that there are 2 to 3 pixels across each resolution element. For convenience,​ the following table shows the conversion from NSIDE to pixel size.+The NSIDE of a Healpix map determines the pixelisation scheme and hence the pixel size. At CADE, we aim for a pixelisation scheme such that there are 2 to 3 pixels across each resolution element. For convenience,​ the following table shows the conversion from NSIDE to pixel size.  
 + 
 +^ NSIDE      ^ Pixel Size       ^ Input Resolution* ​ ^ 
 +^                    ^ [as]                  ^ [as]                         ^  
 +| 256    | 825 | 1980 |  
 +| 512    | 413 | 990 |  
 +| 1024    | 206 | 495 |  
 +| 2048    | 103 | 248 |  
 +| 4096    | 52 | 124 |  
 +| 8192    | 26 | 62 |  
 +| 16384  | 13 | 31 |  
 +* assuming 2.4 pixels per resolution element ​
  
 +=== Can I have a version of a CADE Healpix map in Equatorial coordinates?​ ===
  
 +Yes (probably). For historical reasons, most maps distributed by CADE use a Galactic coordinate system. For some surveys, we distribute maps in both Galactic and J2000 coordinates (see the individual survey pages). Please contact us at [[cade@irap.omp.eu|cade@irap.omp.eu]] if you don't find the map in Equatorial coordinates that you are looking for.