PDS_VERSION_ID        = PDS3                                                 
DATA_SET_ID           = "V15/V16-V-ROE-5-OCC-ELECTRON-DENS-V1.0"             
RECORD_TYPE           = STREAM                                               
OBJECT                = TEXT                                                 
  INTERCHANGE_FORMAT  = ASCII                                                
  PUBLICATION_DATE    = 2014-04-18                                           
  NOTE                = "ERRATA.TXT reflects any changes or errors made      
                        to this volume."                                     
END_OBJECT            = TEXT                                                 
                                                                             
END                                                                          
                                                                             
          Venera 15 and 16 Electron Density Profiles Data Archive            
           (DATASET_ID V15/V16-V-ROE-5-OCC-ELECTRON-DENS-V1.0)               
                                                                             
                               ERRATA.TXT                                    
                                                                             
                              Paul Withers                                   
                            Boston University                                
                                                                             
                                                                             
========================================================================     
INTRODUCTION                                                                 
========================================================================     
                                                                             
This file contains a listing of errors, anomalies, and other notes           
regarding the Venera 15 and 16 Electron Density Profiles Data Archive.       
                                                                             
                                                                             
========================================================================     
ERRORS, ANOMALIES, AND OTHER NOTES                                           
========================================================================     
                                                                             
Note 2014-04-13:                                                             
                                                                             
In DATA/*.LBL - there are 29 Type_Mismatch validation errors for START_TIME  
reported by the Ames Volume Validation tool. The error report states:        
"START_TIME only accepts a type of TIME and value                            
*** was interpreted as a TextString". However, the Dataset.Cat file          
explains that all dates and times reported in this dataset are in the Moscow 
winter timezone, not UTC. This time zone is currently three hours ahead of   
UTC.  Times have not been converted into UTC.                                
See CATALOG/V15_V16_ROE_DS.CAT for more information.                         
                                                                             
In DATA/*.LBL - there are 29 Unknown_Keyword validation errors.  The         
error reports: "No definition was found for the keyword                      
PPI_SOLAR_ZENITH_ANGLE". These are known and accepted errors.  The           
PPI_SOLAR_ZENITH_ANGLE keyword is not considered valid by the current PDS3   
volume validation tools.                                                     
                                                                             
Definition:                                                                  
PPI_SOLAR_ZENITH_ANGLE - the angle measured from directly overhead to the    
geometric centre of the sun's disc, as described using a horizontal          
coordinate system. The solar elevation angle is the altitude of the sun,     
the angle between the horizon and the centre of the sun's disc.              
                                                                             
In DOCUMENT/GMA-2009_1223.LBL there is a validation error                    
due to the length of the document name. "Detection of Ionospheric Layers in  
the Dayside Ionosphere of Venus at Altitudes of 80 to 120 km from Venera 15  
and 16 Two Frequency Radio Occultation Results", 157 characters, is greater  
than the acceptable maximum length of "120" for "DOCUMENT_NAME" with the     
type "CHARACTER".                                                            
                                                                             
  Non-Standard Practices                                                     
The PDS standards do not specify where to store the required MD5 checksum    
file for a volume.  We have placed it in the root dietary of the volume      
with the file name "CHECKSUMS.TXT".  This may be considered invalid by some  
verifiers.