PDS_VERSION_ID        = PDS3
RECORD_TYPE           = STREAM
OBJECT                = TEXT
  INTERCHANGE_FORMAT    = ASCII
  PUBLICATION_DATE      = 2006-09-12
  NOTE                  = "N/A"
END_OBJECT            = TEXT

END

                            Cassini-Huygens 
		Atmospheric Structure Instrument (HASI)Data Archive
                          (HP-SSA-HASI-2-3-4-MISSION-V1.1)

                               ERRATA.TXT
                             

==============================================================================
INTRODUCTION
==============================================================================

     This file contains a list of files of the HASI Data Archive that have been 
corrected and replaced. The corrections applied with reference to incorrect 
files previously provided are also described.  

==============================================================================
CORRECTIONS AND NOTES
==============================================================================

      
        The following data files have been corrected and replaced within the 
DATA directory:
	\TEM\ 
HASI_L4_TEM_TEMPERATURE.TAB/LBL 
	\ACC\ 
HASI_L4_ACCE_ACC_VEL.TAB/LBL 
HASI_L4_ACCE_DENSITY.TAB/LBL
	\PROFILES\ 
HASI_L4_ALTITUDE_PROFILE.TAB/LBL 
HASI_L4_VELOCITY_PROFILE.TAB/LBL 
HASI_L4_ATMO_PROFILE_ENTRY.TAB/LBL 
HASI_L4_ATMO_PROFILE_DESCEN.TAB/LBL 
	\PWA\ 
HASI_L2_PWAD23_MIP.TAB/LBL
HASI_L2_PWAD3_F0_RAU.TAB/LBL
HASI_L2_PWAD3_F13_RAU.TAB/LBL
HASI_L2_PWAD3_F26_RAU.TAB/LBL
HASI_L2_PWAD3_F52_RAU.TAB/LBL
HASI_L2_PWAS_MIP.TAB/LBL


        The filename of the following HASI file was incorrect. 
Please note the correct name:

     Correct File Name                Incorrect File Name
HASI_L4_TEM_TEMPERATURE.TAB\LBL 	HASI_L4_TEM_TEMPERATURE_D.TAB\LBL 

This data file contains data from the descent and surface phases, therefore '_D' 
suffix should not be present in the filename. 
      
     HASI_L4_TEM_TEMPERATURE and HASI_L4_ATMO_PROFILE_DESCEN 
contained temperature data not dynamically corrected for aerodynamical effects 
and sensor response (post-calibration) contrary to what was stated in the HASI 
EAICD document and in the labels. 
The new files contain the corrected calibrated values of temperature. 
     The other data files (acceleration, velocity, altitude and atmospheric 
entry profiles) relevant to the upper atmosphere (entry phase) have been corrected 
using the data resulting from the latest refinement of the reconstruction 
algorithm using a more accurate model of the mean molecular weight profile. 
The new model of the mean molecular weight profile is consistent with 
composition measured by Huygens GCMS in the lower atmosphere and retrieved from 
Cassini INMS data at 1500 km. The resulting trajectory and atmospheric profiles 
are not significantly different from the previous ones. 
     The atmospheric entry profiles have been cut down at t0, since values 
retrieved from acceleration during the parachute deployment phase (relevant to 
time > t0) are not reliable. 
     The method and procedure used to derive higher level products is briefly 
described in the HASI calibration reports contained in the HASI data set within 
the CALIB directory.

     Only data files relevant to engineering data (level 2) of the PWA 
subsystem have been provided. The data files relevant to scientific data and 
higher level products (level 3 and 4) are missing in this version of the HASI 
data set and will be provided in future versions together with the processing and 
calibration information.

For the Radar files HASI_L2_PWAD3_FXX_RAU ( where XX is for 0,13,26,52) there are 
minor corrections in the LBL file, namely removing spaces and changing "Product Name"
in order to include more consistent information. Before we had 60-0km in all files
but data is limited in a specific altitude range in each file: 60-10; 10-8; 8-6; 6-0km.
The mutual impedance files HASI_L2_PWAS_MIP and HASI_L2_PWAD23_MIP had some corrupted 
columns and some errors in timing so they have been corrected and updated. Furthermore 
TAB file did not correspond to the LBL file for what concern the column content.