MESSENGER XRS Derived Data

X-Ray Spectrometer (XRS) Derived product types

Instrument:MESSENGER X-Ray Spectrometer

PDS4 Bundle:urn:nasa:pds:mess_xrs_derivedDOI: 10.17189/1518582

MESSENGER PDS3 to PDS4 Migration Status: Complete

For more information about XRS calibrated products, see the Product SIS.

Note: The product SIS was created for PDS3, but it is still applicable to the data after the PDS4 migration.

The MESSENGER XRS derived product collection consists of a set of footprint polygons for the XRS field of view during instrument observations and a set of maps showing elemental ratios derived for the XRS spectra. A description of each product type is given in the table below. Code refers to the product type abbreviation used in the file name.

Code	Product Type	Description	Storage Format
	Footprint	This product type consists of a set of points in latitude and longitude that correspond to the perimeter field of view of the XRS during integration time of the calibrated products.	ASCII Delimited Table
	Map	The product type is a series of maps depicting ratios of detected elements and the uncertainties in the ratios. A third set of maps shows the effective map resolution.	Image Array and JPEG2000

XRS Derived map products have the following file names:

xrs_mmm_ee_si_yyyymmdd.xxx

where:

mmm = Type:

map = map

unc = uncertainty

res = resolution

ee = 2-character element identifier

al = aluminum

ca = calcium

fe = iron

mg = magnesium

s_ = sulfur

si = element consequent in the ratio = silicon

yyyy = 4-digit year corresponding to the last CDR sample included in the map

mm = 2-digit month (01-12) corresponding to the last CDR sample included in the map

dd = 2-digit day of month (01-31) corresponding to the last CDR sample included in the map

xxx = file type (jp2 or img)

XRS Derived footprint products have the following file names:

xrs_fp_p_met.csv

where:

p = Spacecraft clock time partition (1 or 2)

met = Spacecraft clock time in seconds