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PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  INTERCHANGE_FORMAT    = ASCII                                               
  PUBLICATION_DATE      =  2016-11-30
  NOTE                  = "Introduction to this archive volume."              
END_OBJECT            = TEXT                                                  
                Volume ID: RORSI_2094
                Data from Experiments on 2014/249
                RO PRELANDING
                    Rheinisches Institut fuer Umweltforschung                 
                           at the University of Cologne                       
                         Department of Planetary Research                     
     This electronic media contains archival raw, partially processed, and
     ancillary/supporting radio science data acquired during the 
     The definition of the mission phases
     is given in CATALOG/MISSION.CAT.

The radio observations were carried out using the ROS spacecraft and 
Earth based receiving station in New Norcia, Australia (ESA), or the DSN
stations (NASA). 

Each disc in the volume set contains data from one day of the mission
phase. Data are organized in approximate chronological order, though
receipt at Cologne was generally more important in determining 
placement than strict order of generation or applicability. If data
are not or just incomplete available for archiving, the affected day will
be skipped. The archiving of this day takes place some time later. For
this reason a strict chronological order of data organization can not be
adhered to. A table of contents is included with each volume, listing
each file in the volume; a separate table of contents shows all files
within the data set.       
The table below lists the individual volumes (CDs) created to date and
(very briefly) their respective contents.                             

  RSI VOLUME ID    VOLUME_ID     Start Date    Measurement
  -------------    ----------    ----------    -------------
  RORSI_0001       RORSI_0001    2004-03-26    Commissioning 
  RORSI_0002       RORSI_0002    2004-03-27    Commissioning 
  RORSI_0003       RORSI_0003    2004-03-28    Commissioning 
  RORSI_0004       RORSI_0004    2004-03-29    Commissioning 
  RORSI_0005       RORSI_0005    2004-05-02    Commissioning 
  RORSI_0006       RORSI_0006    2004-05-03    Commissioning 
  RORSI_0007       RORSI_0007    2004-05-04    Commissioning 
  RORSI_0008       RORSI_0008    2004-05-05    Commissioning 
  RORSI_0009       RORSI_0009    2004-05-06    Commissioning 
  RORSI_0010       RORSI_0010    2004-09-11    Commissioning 
  RORSI_0011       RORSI_0011    2004-10-09    Commissioning 
  RORSI_0012       RORSI_5001    2005-04-06    Checkout               
  RORSI_0013       RORSI_5002    2005-04-06    Checkout 
  RORSI_0014       RORSI_5003    2005-09-29    Checkout 
  RORSI_0015       RORSI_3001    2006-03-02    Solar Conjunction 
  RORSI_0016       RORSI_3021    2006-03-15    Solar Conjunction 
  RORSI_0017       RORSI_3007    2006-03-16    Solar Conjunction 
  RORSI_0018       RORSI_3002    2006-03-22    Solar Conjunction 
  RORSI_0019       RORSI_3003    2006-03-23    Solar Conjunction 
  RORSI_0020       RORSI_3004    2006-03-24    Solar Conjunction 
  RORSI_0021       RORSI_3005    2006-03-28    Solar Conjunction 
  RORSI_0022       RORSI_3006    2006-03-29    Solar Conjunction 
  RORSI_0023       RORSI_3008    2006-03-30    Solar Conjunction 
  RORSI_0024       RORSI_3009    2006-03-31    Solar Conjunction 
  RORSI_0025       RORSI_3010    2006-04-01    Solar Conjunction 
  RORSI_0026       RORSI_3011    2006-04-04    Solar Conjunction 
  RORSI_0027       RORSI_3024    2006-04-05    Solar Conjunction 
  RORSI_0028       RORSI_3012    2006-04-06    Solar Conjunction 
  RORSI_0029       RORSI_3013    2006-04-07    Solar Conjunction 
  RORSI_0030       RORSI_3014    2006-04-08    Solar Conjunction 
  RORSI_0031       RORSI_3015    2006-04-10    Solar Conjunction 
  RORSI_0032       RORSI_3025    2006-04-15    Solar Conjunction 
  RORSI_0033       RORSI_3026    2006-04-16    Solar Conjunction 
  RORSI_0034       RORSI_3027    2006-04-17    Solar Conjunction 
  RORSI_0035       RORSI_3036    2006-04-18    Solar Conjunction 
  RORSI_0036       RORSI_3029    2006-04-19    Solar Conjunction 
  RORSI_0037       RORSI_3016    2006-04-20    Solar Conjunction 
  RORSI_0038       RORSI_3030    2006-04-21    Solar Conjunction 
  RORSI_0039       RORSI_3031    2006-04-22    Solar Conjunction 
  RORSI_0040       RORSI_3017    2006-04-23    Solar Conjunction 
  RORSI_0041       RORSI_3018    2006-04-24    Solar Conjunction 
  RORSI_0042       RORSI_3032    2006-04-25    Solar Conjunction 
  RORSI_0043       RORSI_3019    2006-04-26    Solar Conjunction       
  RORSI_0044       RORSI_3020    2006-04-27    Solar Conjunction 
  RORSI_0045       RORSI_3037    2006-04-28    Solar Conjunction 
  RORSI_0046       RORSI_3022    2006-04-29    Solar Conjunction 
  RORSI_0047       RORSI_3038    2006-05-02    Solar Conjunction 
  RORSI_0048       RORSI_3039    2006-05-03    Solar Conjunction 
  RORSI_0049       RORSI_3023    2006-05-04    Solar Conjunction 
  RORSI_0050       RORSI_3040    2006-05-09    Solar Conjunction 
  RORSI_0051       RORSI_3041    2006-05-10    Solar Conjunction 
  RORSI_0052       RORSI_5004    2006-08-22    Checkout 
  RORSI_0053       RORSI_5005    2006-11-22    Checkout 
  RORSI_0060       RORSI_5006    2007-05-15    Checkout 
  RORSI_0061       RORSI_5007    2007-10-10    Checkout 
  RORSI_0063       RORSI_5008    2008-01-03    Checkout 
  RORSI_0064       RORSI_5009    2008-11-04    Checkout
  RORSI_0120       RORSI_3033    2006-11-04    Solar Conjunction
  RORSI_0120       RORSI_6001    2010-07-10    Lutetia
  RORSI_0121       RORSI_3028    2006-04-12    Solar Conjunction
  RORSI_0122       RORSI_3034    2006-04-13    Solar Conjunction
  RORSI_0123       RORSI_3035    2006-04-13    Solar Conjunction 
  RORSI_0181       RORSI_2001    2014-08-06    Global Gravity 
  RORSI_0182       RORSI_2002    2014-08-06    Global Gravity 
  RORSI_0183       RORSI_2003    2014-08-06    Global Gravity 
  RORSI_0184       RORSI_2004    2014-08-06    Global Gravity 
  RORSI_0185       RORSI_2005    2014-08-07    Global Gravity 
  RORSI_0186       RORSI_2006    2014-08-07    Global Gravity 
  RORSI_0187       RORSI_2007    2014-08-07    Global Gravity 
  RORSI_0188       RORSI_2008    2014-08-08    Global Gravity 
  RORSI_0189       RORSI_2009    2014-08-08    Global Gravity 
  RORSI_0190       RORSI_2010    2014-08-08    Global Gravity 
  RORSI_0191       RORSI_2011    2014-08-09    Global Gravity 
  RORSI_0192       RORSI_2012    2014-08-09    Global Gravity 
  RORSI_0193       RORSI_2013    2014-08-09    Global Gravity 
  RORSI_0194       RORSI_2014    2014-08-10    Global Gravity 
  RORSI_0195       RORSI_2015    2014-08-10    Global Gravity 
  RORSI_0196       RORSI_2016    2014-08-10    Global Gravity 
  RORSI_0197       RORSI_2017    2014-08-11    Global Gravity 
  RORSI_0198       RORSI_2018    2014-08-11    Global Gravity 
  RORSI_0199       RORSI_2019    2014-08-12    Global Gravity 
  RORSI_0200       RORSI_2020    2014-08-12    Global Gravity 
  RORSI_0201       RORSI_2021    2014-08-12    Global Gravity 
  RORSI_0202       RORSI_2022    2014-08-12    Global Gravity 
  RORSI_0203       RORSI_2023    2014-08-13    Global Gravity 
  RORSI_0204       RORSI_2024    2014-08-13    Global Gravity 
  RORSI_0205       RORSI_2025    2014-08-14    Global Gravity 
  RORSI_0206       RORSI_2026    2014-08-14    Global Gravity 
  RORSI_0207       RORSI_2027    2014-08-14    Global Gravity 
  RORSI_0208       RORSI_2028    2014-08-15    Global Gravity 
  RORSI_0209       RORSI_2029    2014-08-15    Global Gravity 
  RORSI_0210       RORSI_2030    2014-08-15    Global Gravity 
  RORSI_0211       RORSI_2031    2014-08-16    Global Gravity 
  RORSI_0212       RORSI_2032    2014-08-16    Global Gravity 
  RORSI_0213       RORSI_2033    2014-08-17    Global Gravity 
  RORSI_0214       RORSI_2034    2014-08-17    Global Gravity 
  RORSI_0215       RORSI_2035    2014-08-17    Global Gravity 
  RORSI_0216       RORSI_2036    2014-08-17    Global Gravity 
  RORSI_0217       RORSI_2037    2014-08-17    Global Gravity 
  RORSI_0218       RORSI_2038    2014-08-18    Global Gravity 
  RORSI_0219       RORSI_2039    2014-08-18    Global Gravity 
  RORSI_0220       RORSI_2040    2014-08-18    Global Gravity 
  RORSI_0221       RORSI_2041    2014-08-19    Global Gravity 
  RORSI_0222       RORSI_2042    2014-08-19    Global Gravity 
  RORSI_0223       RORSI_2043    2014-08-19    Global Gravity 
  RORSI_0224       RORSI_2044    2014-08-20    Global Gravity 
  RORSI_0225       RORSI_2045    2014-08-20    Global Gravity 
  RORSI_0226       RORSI_2046    2014-08-20    Global Gravity 
  RORSI_0227       RORSI_2072    2014-08-21    Global Gravity 
  RORSI_0228       RORSI_2047    2014-08-21    Global Gravity 
  RORSI_0229       RORSI_2048    2014-08-21    Global Gravity 
  RORSI_0230       RORSI_2049    2014-08-22    Global Gravity 
  RORSI_0231       RORSI_2050    2014-08-22    Global Gravity 
  RORSI_0232       RORSI_2051    2014-08-22    Global Gravity 
  RORSI_0233       RORSI_2052    2014-08-23    Global Gravity 
  RORSI_0234       RORSI_2053    2014-08-23    Global Gravity 
  RORSI_0235       RORSI_2054    2014-08-23    Global Gravity 
  RORSI_0236       RORSI_2055    2014-08-24    Global Gravity 
  RORSI_0237       RORSI_2056    2014-08-24    Global Gravity 
  RORSI_0238       RORSI_2057    2014-08-24    Global Gravity 
  RORSI_0239       RORSI_2059    2014-08-25    Global Gravity 
  RORSI_0240       RORSI_2058    2014-08-24    Global Gravity 
  RORSI_0241       RORSI_2060    2014-08-25    Global Gravity 
  RORSI_0242       RORSI_2061    2014-08-25    Global Gravity 
  RORSI_0243       RORSI_2062    2014-08-25    Global Gravity 
  RORSI_0244       RORSI_2063    2014-08-26    Global Gravity 
  RORSI_0245       RORSI_2064    2014-08-26    Global Gravity 
  RORSI_0246       RORSI_2065    2014-08-26    Global Gravity 
  RORSI_0247       RORSI_2066    2014-08-27    Global Gravity 
  RORSI_0248       RORSI_2067    2014-08-27    Global Gravity 
  RORSI_0249       RORSI_2068    2014-08-27    Global Gravity 
  RORSI_0250       RORSI_2069    2014-08-27    Global Gravity 
  RORSI_0251       RORSI_2070    2014-08-28    Global Gravity 
  RORSI_0252       RORSI_2071    2014-08-28    Global Gravity 
  RORSI_0253       RORSI_2073    2014-08-28    Global Gravity 
  RORSI_0254       RORSI_2074    2014-08-29    Global Gravity 
  RORSI_0255       RORSI_2075    2014-08-29    Global Gravity 
  RORSI_0256       RORSI_2076    2014-08-30    Global Gravity 
  RORSI_0257       RORSI_2077    2014-08-30    Global Gravity 
  RORSI_0258       RORSI_2078    2014-08-30    Global Gravity 
  RORSI_0259       RORSI_2079    2014-08-30    Global Gravity 
  RORSI_0260       RORSI_2080    2014-08-31    Global Gravity 
  RORSI_0261       RORSI_2081    2014-08-31    Global Gravity 
  RORSI_0262       RORSI_2082    2014-08-31    Global Gravity 
  RORSI_0263       RORSI_2083    2014-08-31    Global Gravity 
  RORSI_0264       RORSI_2084    2014-09-01    Global Gravity 
  RORSI_0265       RORSI_2085    2014-09-01    Global Gravity 
  RORSI_0266       RORSI_2086    2014-09-02    Global Gravity 
  RORSI_0267       RORSI_2087    2014-09-02    Global Gravity 
  RORSI_0268       RORSI_2088    2014-09-03    Global Gravity 
  RORSI_0269       RORSI_2089    2014-09-03    Global Gravity 
  RORSI_0270       RORSI_2090    2014-09-04    Global Gravity 
  RORSI_0271       RORSI_2091    2014-09-04    Global Gravity 
  RORSI_0272       RORSI_2092    2014-09-05    Global Gravity 
  RORSI_0273       RORSI_2093    2014-09-05    Global Gravity 
  RORSI_0274       RORSI_2094    2014-09-06    Global Gravity 

VOLUME SET INFORMATION                                                
This volume is one of several which contain raw and partially processed  
data from the ROS phase ROSETTA PRELANDING.                                        
Each archive volume has the structure illustrated in the diagram below.       
Not all directories or file types will be present on every volume; for       
example, one volume may contain either IFMS or DSN Data Files.                
In cases where the directory contains no files, the directory                 
itself has been omitted from the volume.                                      
The primary data types for these volumes are IFMS closed-loop and
open-loop data files if the data was retrieved from an ESA ground
station. These files are the Level 1a/1b files (RAW), which contain
the data as recorded at the ground station and the Level 2 files
(TAB), which contain calibrated frequency data. In case of data files
received with DSN ground stations, these are the DSN Radio-Science
Receiver (RSR) data files, the Orbit Data File (ODF), and the Tracking
and Navigation Data File (TNF). All these files are stored in the DATA
folder in the root directory within appropriate subfolders.              
The primary data files are accompanied by a number of ancillary files
in the CALIB directories and the ANCILLARY folders of the EXTRAS 
directories. Additional documents providing information on the
spacecraft, ground stations, used software and data processing
steps can be found in the DOCUMENT directory. Users should consult
the tables of contents in the INDEX directory for file locations.   
The diagram below shows the organization of each volume, starting from
the root of the compact disc.                                         
     |- AAREADME.TXT                                                  
     |- ERRATA.TXT                                                    
     |- VOLDESC.CAT                                                   
     |- BROWSE                                                        
     |     |                                                          
     |     |- BROWINFO.TXT    Description of the BROWSE directory
     |                        which includes Quick Look Browse Plots 
     |                        of the data.                            
     |- CALIB                                                         
     |     |                                                          
           |- CALINFO.TXT     Overview of directory                   
     |     |- CLOSED_LOOP                                             
     |            |-IFMS      IFMS closed-loop calibration files      
     |            |-DSN       DSN closed-loop calibration files       
     |     |- OPEN_LOOP                                               
     |            |-IFMS      IFMS open-loop calibration files         
     |            |-DSN       DSN open-loop calibration files          
     |                        This folder will only be generated if
     |                        the uplink frequency in one of the RAW
     |                        files was identified as wrong.
     |                        It tells the user which files were 
     |                        affected and where to find the corrected
     |                        Level 2 data files.
     |- CATALOG                                                       
     |     |                                                          
     |     |- CATINFO.TXT       Streamlined PDS catalog files         
     |     |- MISSION.CAT       for mission, host, instrument,        
     |     |- INSTHOST.CAT      references, personnel, and            
     |     |- INST.CAT          data set (files evolve as             
     |     |- REF.CAT           mission progresses).                  
     |     |- PERSON.CAT                                              
     |     |- DATASET.CAT
     |     |- SOFT.CAT                                              
     |     |- TARGET.CAT                                              
     |- DATA                                                          
     |     |                                                          
     |     |- LEVEL1A                                                 
     |            |- CLOSED_LOOP                                      
     |                 |-IFMS    IFMS closed-loop data files(Level 1a)
     |                 |-DSN     DSN closed-loop data files (Level 1a)
     |            |- OPEN_LOOP                                        
     |                 |-IFMS    IFMS open-loop data files  (Level 1a)
     |                 |-DSN     DSN open-loop data files   (Level 1a)
     |     |- LEVEL1b                                                 
     |            |- CLOSED_LOOP                                      
     |                 |-IFMS    IFMS closed-loop data files(Level 1b)
     |                 |-DSN     DSN closed-loop data files (Level 1b)
     |            |- OPEN_LOOP                                        
     |                 |-IFMS    IFMS open-loop data files  (Level 1b)
     |                 |-DSN     DSN open-loop data files   (Level 1b)
     |     |- LEVEL02                                                 
     |            |- CLOSED_LOOP                                      
     |                 |-IFMS    IFMS closed-loop data files (Level 2)
     |                 |-DSN     DSN closed-loop data files  (Level 2)
     |            |- OPEN_LOOP                                        
     |                 |-IFMS    IFMS open-loop data files   (Level 2)
     |                 |-DSN     DSN open-loop data files    (Level 2)
     |- EXTRAS                                                        
     |     |                                                     
     |     |- ANCILLARY                                               
     |          |- SPICE    SPICE Ancillary Data files                
     |          |- ESOC     ESOC Ancillary Data files                 
     |          |- UNIBW    UniBW Ancillary Data files
     |          |- RSI      Level 2 Processing logfiles       
     |          |- SUE      Modified Spice kernels
     |          |- DSN      Earth Orientiation Parameter files, 
     |                      Light Time File and Orbit Propagation and
     |                      Timing Geometry File
     |- INDEX                                                         
     |     |                                                          
     |     |- INDXINFO.TXT     Overview of directory                  
     |     |- INDEX.LBL        Label to INDEX.TAB                     
     |     |- INDEX.TAB        List of data file contents, this volume
     |     |- BROWSE_INDEX.TAB List of all files in BROWSE directory
     |     |                                                   
     |     |- DOCINFO.TXT     Overview of directory         
     |     |- RSI_DOC         RSI documents                     
     |     |- ESA_DOC         ESA documents                
     |     |- DSN_DOC         DSN documents documents  
     A cumulative list of errors and changes is maintained in the file
ERRATA.TXT at the root level of each volume. The ERRATA.TXT file of   
the latest volume will list errors occured in earlier volumes.        
DATASET FORMAT                                                        
     The dataset is organized according to the PDS standard for
'one data set, one volume.' This file (AAREADME.TXT), a PDS volume 
object definition (VOLDESC.CAT), and the listing of errors and changes
(ERRATA.TXT) are included at the root level. The following directories
of descriptive material are also at the root level:                   
   CALIB     contains data files for data calibration, e.g. the IFMS  
             Range calibration files and IFMS Meteo files containing  
             Meteorological data from ground station.                 
             In case of DSN data the appropriate calibration files are
             Meteo files.     
             Note: If the uplink frequency in one of the RAW files was
                   identified as wrong the folder UPLINK_FREQ_CORRECT
                   will contain files which identify
                   which files were affected and where to find the    
                   corrected Level 2 data files.         
   CATALOG   contains descriptive files for cataloging the data       
             on this disc.                                            
   BROWSE    contains Quick Look Browse Plots of the data.       
   INDEX     contains index information on each of the data files     
             included in this disc; it also includes a cumulative     
             index to all files in this volume set.                   
   DATA      contains the scientific data of data level 1a, 1b and    
             Level 2. The different data files are described with     
             Detached labels.                                         
   EXTRAS    contains additional information which may help some      
             users understand or manipulate data;                     
             The ANCILLARY subfolder contains ancillary data          
             about spacecraft orbit, attitude                         
             clock conversions, planetary ephemerises and constants in
             two different formats: the NAIF SPICE software and the   
             OASW software from ESOC. Additional data files from the  
             Universitaet der Bundeswehr, Munich, are also stored in
             a appropriate subfolder, if available.                   
   DOCUMENT  contains the files that provide documentation and 
             supplementary information to assist in understanding and 
             using the data products on the volume.                   
FILE FORMAT                                                           
The file format of the data files on a volume depends on the data 
type, IFMS Or DSN data. The IFMS data files are all in ASCII format.
The Level 1a closed-loop and open loop DSN data files on the other
hand are binary, while the Level 2 files are in ASCII format. The
Format description can be found in the DOCUMENT folders of the EXTRAS
Directory. All documents in the DOCUMENT subdirectories are in the   
binary PDF Format, which can be read by nearly all standard text     
readers, e.g. Adobe Acrobat Reader.     
Most of the data files in the dataset are accompanied by detached 
PDS labels, which describe their contents. Some data products have so
called 'combined detached' labels, where one label covers two or more
data files. Detached labels have the same file name as the data file 
except that the label name has the suffix 'LBL'.                      
Scientific Software for processing and analyzing of the RSI data 
files are not included in any RSI data volume.                        
These data were collected under auspices of the Rosetta Project.
M. Paetzold of the Rhenish Institute of Environmental Research at the 
University of Cologne as the Principal Investigator of the 
Radio-Science Experiment RSI was the team leader. Members of the     
team, including B. Haeusler (UniBW, Munich) were involved in data    
acquisition and validation.

Although considerable care has gone into making this volume set, 
errors are both possible and likely.  Users of the data are advised to
exercise the same caution as they would when dealing with any other 
unknown data set.      
Reports of errors or difficulties would be appreciated.  
Please contact one of the persons listed below.                       
COGNIZANT PERSONNEL                                                   
The person most directly responsible for construction and release of  
this volume set is Martin Paetzold (PI). Although many people 
contributed to the volume set, any faults in the product 
are his alone.    
MARTIN PAETZOLD                                                       
AN DER UNIVERSITAET ZU KOELN                                          
AACHENER STR. 209                                                     
50931 COLOGNE                                                         
TEL: +49/221/27781810
BERND HAEUSLER                                                        
INSTITUT FUER RAUMFAHRTTECHNIK,                                       
UNIVERSITAET DER BUNDESWEHR,                                          
TEL: +49/89/6004-2138

ACRONYMS AND ABBREVIATIONS                                            
AGK    Antenna Gain Kernel (file and/or directory)                    
AMD    Angular Momentum Desaturation (file and/or directory)          
ATDF   Archival Tracking Data File (same as TDF)                      
CALIB  Calibration (file and/or directory)                            
CD     Compact Disc                                                   
DKF    DSN Keyword File (file and/or directory)                       
DSN    Deep Space Network                                             
ECH    Engineering - Channelized data (file and/or directory)         
ECS    Engineering - Channelized data Summary (file and/or directory) 
ECT    Engineering Channel Table                                      
EOP    Earth Orientation Parameters (file and/or directory)           
EPK    Engineering - Packet data (file and/or directory) 
ESA    European Space Agency                    
FBR    Filtered Body Rates (file and/or directory)                    
HEA    Health report (file and/or directory)                          
HGA    High Gain Antenna (device and/or file and/or directory)
IFMS   Intermediate Frequency Modulation System        
ION    Ionosphere Calibration file (file and/or directory)            
LGA    Low Gain Antenna                                               
LIT    Light Time (file and/or directory)                             
MCH    DSN Monitor - Channelized data (file and/or directory)         
MCT    Monitor Channel Table                                          
MIF    Maneuver Implementation/Reconstruction File 
       (file and/or directory)
MOI    Mars Orbit Insertion                                           
MPD    Maneuver Performance Data (file and/or directory)              
MPF    Maneuver Profile File                                          
MPK    DSN Monitor - Packet data (file and/or directory)              
NASA   National Aeronautics and Space Administration                  
occn   occultation                                                    
ODR    Original Data Record (file and/or directory)                   
ODF    Orbit Data File (file and/or directory)                        
ONF    Orbit Number File (file and/or directory)                      
OPT    Orbit Propagation and Timing Geometry (file and/or directory)  
PDS    Planetary Data System                                          
RSI    Radio Science Investigations
RSR    Radio Science Receiver
RSS    Radio Science Subsystem                                        
SAK    Solar Array Kernel (file and/or directory)                     
SFO    Space Flight Operations Sequence (file and/or directory)       
SOE    Sequence of Operations (file and/or directory)                 
SPK    Spacecraft and Planet Kernel (file and/or directory)           
TCK    Text C-Kernel (file and/or directory)                          
TDF    Tracking Data File (file and/or directory)                     
TNF    Tracking and Navigarion file
TIM    Time and Polar Motion (file and/or directory)                  
TMO    Transition to Mapping Orbit                                    
TRO    Troposphere Calibration File (file and/or directory)           
WEA    DSN Weather (file and/or directory)                            
WO     Write Once