Difference between revisions of "Single detector maps"

From Planck PLA 2015 Wiki
Jump to: navigation, search
Line 1: Line 1:
 
[[Category:Mission science products]]
 
[[Category:Mission science products]]
  
−
== VERY MUCH DAFT ==
+
== Introduction ==
  
−
===Description of the product===
+
TBW ….
−
These are maps built using a single detector, and covering the full (or the nominal TBC) mission. They are produced only for the unpolarised bolometers
 
  
−
===Pipeline===
+
Maps for single detectors are built for full or part of the mission and are used primarily for characterization purposes
−
Mapmaking
 
  
−
===Input Data===
+
=== HFI Processing ===
  
−
* Signal TOIs
+
TBW
−
* Destriping offsets
 
−
* Calibration factors (from IMO)
 
  
−
===Related products===
+
=== LFI PRocessing ===
  
−
Other maps
+
TBW
  
−
===Data format===
 
  
−
These maps are delivered as FITS files containing a single extension named CH-MAP with a 3-column table containing:
+
== List of products ==
  
−
* col 1, "I_Stokes": Intensity (units: K_cmb)
+
=== First release ===
−
* col 2, "II_cov": variance estimate (diagonal elements of the pixel covariance matrix) on the Intensity (units: K_cmb)
 
−
* col 3, "Hits": Number of hits per pixel (units: none)
 
  
−
In accordance with ICD-031, all maps are in GALACTIC coordinates with N_side=2048.  There are 18 individual detector maps for HFI (all unpolarised detectors except for the 143-8 and 545-3 RTS bolometers) and ??? for LFI
+
TBW
 +
 
 +
=== Second Release ===
 +
 
 +
TBW
 +
 
 +
== FITS file structure ==
 +
 
 +
The FITS file structure is like that of Intensity-only frequency maps as described in [[Frequency_Maps#FITS_file_structure | the next section]]
  
 
===Header keywords===
 
===Header keywords===

Revision as of 10:35, 3 September 2012


Introduction[edit]

TBW ….

Maps for single detectors are built for full or part of the mission and are used primarily for characterization purposes

HFI Processing[edit]

TBW

LFI PRocessing[edit]

TBW


List of products[edit]

First release[edit]

TBW

Second Release[edit]

TBW

FITS file structure[edit]

The FITS file structure is like that of Intensity-only frequency maps as described in the next section

Header keywords[edit]

A typical header for the extension is 

XTENSION= 'BINTABLE'           / binary table extension                         
BITPIX  =                    8 / 8-bit bytes                                    
NAXIS   =                    2 / 2-dimensional binary table                     
NAXIS1  =                   12 / width of table in bytes                        
NAXIS2  =             50331648 / number of rows in table                        
PCOUNT  =                    0 / size of special data area                      
GCOUNT  =                    1 / one data group (required keyword)              
TFIELDS =                    3 / number of fields in each row                   
TTYPE1  = 'I_Stokes'           / label for field   1                            
TFORM1  = '1E8     '           / data format of field: 4-byte REAL              
TUNIT1  = 'K_CMB   '           / physical unit of field                         
TTYPE2  = 'Hits    '           / label for field   2                            
TFORM2  = '1J      '           / data format of field: 4-byte INTEGER           
TUNIT2  = 'none    '           / physical unit of field                         
TTYPE3  = 'II_cov  '           / label for field   3                            
TFORM3  = '1E8     '           / data format of field: 4-byte REAL              
TUNIT3  = '(K_CMB)^2'          / physical unit of field                         
EXTNAME = 'CH-MAP  '           / name of this binary table extension            
FREQ    = '857     '                                                            
PIXTYPE = 'HEALPIX '                                                            
COORDSYS= 'GALACTIC'                                                            
ORDERING= 'NESTED  '                                                            
FILENAME= 'HFI_857-2_2048_20120210_nominal.fits'                                
NSIDE   =                 2048                                                  
CHANNEL = '857-2   '                                                            
FIRSTPIX=                    0                                                  
LASTPIX =             50331647                                                  
EXTVER  = '1       '                                                            
PROCVER = 'v50     '                                                            
BAD_DATA= '-1.63750E+30'                                                        
COMMENT = 'Rel DR4 '                                                            
END

(Planck) High Frequency Instrument

(Planck) Low Frequency Instrument

Flexible Image Transfer Specification

Cosmic Microwave background

Retrieved from ‘https://wiki.cosmos.esa.int/planckpla2015/index.php?title=Single_detector_maps&oldid=1295’