PDS_VERSION_ID = PDS3 
 
RECORD_TYPE    = STREAM 
 
OBJECT     = TEXT 
  NOTE             = "NIS BROWSE Directory information file" 
  PUBLICATION_DATE = 2001-06-05 
END_OBJECT = TEXT 
END 
 
***** File BROWINFO.TXT 
 
This directory contains the browse facility for the NEAR Infrared 
Spectrometer archive. It consists of a single, HTML index table 
('NISBROWSE.HTM') and the associated image files, stored under 
the 'MAPS/' subdirectory. The HTML and JPEG image files are accessible 
to the contemporary, popular browsers. Note, however, that the 
AVI animation file format is proprietary and may require a 
commercial viewer for display.  Note also that selecting the 
image links from a browser will open the image files in a 
separate window. 
 
Finally, 
 
***N.B.        Files with unusual extensions are present in the directory 
               tree under BROWSE/.  Some of these files 
               also have lines longer than 80 characters. 
               - see BROWSE/BROWINFO.TXT 
               - Brian Carcich 
 
 
NOTE 
==== 
 
The label and manifest table ('MANIFEST.TAB') written for these 
files and the approach used in archiving this facility make use 
of prototype standards which have not yet been formally incorporated 
into the PDS system. For this reason, support for this facility 
within the PDS is extremely limited. Once the standards have been 
fully accepted and integrated into the PDS archives, the labels and 
files in this directory will be updated by the Small Bodies Node to 
reflect the final version of the standard. 
 
 
Structure 
========= 
 
This facility consists of two parts: 
 
  1. An HTML file containing a table of NIS observations, listing 
     parameters and links to various related images; and 
 
  2. A subdirectory structure containing the referenced images. 
 
The image subdirectory is subdivided based on the content of 
the images to be displayed. The main subdirectories and their 
contents are described below. 
 
  COVERAGE/ 
  --------- 
 
  JPEG image files showing a simple cylindrical projection map of the 
  coverage of Eros obtained by NIS during each set of observations. 
  Coverage is defined as the number of NIS spectra occurring within 
  each plate of a 22,540 plate shape model of Eros. 
 
  EMI/ 
  ---- 
 
  JPEG image files showing a simple cylindrical projection map of the 
  average emission angle of all NIS spectra within each plate that is 
  covered by NIS during each set of observations.  Emission angle was 
  determined relative to a 22,540 plate shape model of Eros. 
 
 
  INC/ 
  ---- 
 
  JPEG image files showing a simple cylindrical projection map of the 
  average incidence angle of all NIS spectra within each plate that is 
  covered by NIS during each set of observations.  Incidence angle was 
  determined relative to a 22,540 plate shape model of Eros. 
 
 
  IOF/ 
  ---- 
 
  JPEG image files showing a simple cylindrical projection map of the 
  average I/F at 950 nm of all NIS spectra within each plate that is 
  covered by NIS during each set of observations.  I/F is radiance 
  factor, and is compiled for each spectrum in the NIS Level 2 
  released PDS archive. 
 
 
  MOVIES/ 
  ------- 
 
  AVI format animation files showing a simulation of each NIS 
  observation of Eros. Predicted NIS footprints were projected onto 
  a shape model of Eros using the best available NEAR trajectory 
  and instrument pointing information as of the end of the mission. 
  The "SNR" parameter in the upper left displays a measure of the 
  actual NIS signal level in the Ge detectors for each spectrum. 
 
 
  PHASE/ 
  ------ 
 
  JPEG image files showing a simple cylindrical projection map of the 
  average phase angle of all NIS spectra within each plate that is 
  covered by NIS during each set of observations.  Phase angle was 
  determined relative to a 22,540 plate shape model of Eros. 
 
 
  PREDICT/ 
  -------- 
 
  JPEG image files showing a shape model representation of Eros and 
  predicted representative footprints for the NIS and/or MSI fields of 
  view for each set of observations. 
 
 
  RES/ 
  ---- 
 
  JPEG image files showing a simple cylindrical projection map of the 
  average spatial resolution of all NIS spectra within each plate that 
  is covered by NIS during each set of observations.  Resolution is 
  defined as the length, in km, of the short axis of the NIS narrow 
  field of view, and was determined using a 22,540 plate shape model 
  of Eros.