This document describes the naming convention of final products contained in the Cartographic Products for the NEAR mission.
There are two types of files in the Products:
- The individual images. These files have the following naming convention:
MMETFFILTER.BACKPLANE.FIT
Where MET is the MET when the image was acquired.
FILTER is the filter number used to acquire the image
And BACKPLANE is one of the following:
- IMG: IMaGe data
- EMA: EMission Angle
- INC: INCedence angle
- LAT: LATitude
- LON: LONgitude
- PHA: PHAse angle
- RES: RESolution
- TOP: TOPogrophy
For example, product file M0144922620F6.EMA.FIT was taken at MET 0144922620 using filter 6 and is the emission angle backplane.
- The mosaic files have the following naming convention:
mosaic-BACKCHK.BACKPLANE.FIT
BACKCHK is either albedo or resolution. BACKCHK indicates how each pixel in the mosaic was chosen from areas of overlap from the incoming images, not the physical unit of the pixel (all image data are in units of I/F). Therefore, a resolution mosaic was generated by selecting the best resolution pixel among all individual input images. This was done on a per pixel basis. So, each pixel in the mosaic has the best resolution possible from the input images.
An I/F mosaic with the best possible photometric parameters for albedo studies was generated by keeping the I/F pixel with the lowest value of param:
param = resolution*[1/cos(emission angle)+1/cos(incidence angle)]
among all individual input images. Again this was done on a per pixel basis. Please Note: Despite the word albedo in the naming convention, the physical units in the image are I/F. The word albedo simply indicates that the mosaicking decision was based on photometric geometry optimized for photometric studies.
BACKPLANE is the same as previously described.
For example, mosaic-resolution.PHA.FIT is a mosaicked image where each pixel is the best resolution available from the input images and it is the phase angle backplane.