Pioneer Venus Orbiter (PVO) was the first orbiter mission designed to conduct a 
comprehensive and long term investigation of the planet Venus. PVO measured the 
detailed structure of the upper atmosphere and ionosphere of Venus and investigated 
the interaction of the solar wind with the Venusian ionosphere. 

The 10-min merged plasma and magnetic field data "pioneervenus_merged_solar-wind_10m.dat" 
are made using the flat files from University of California, Los Angeles. 

They are 10-minute averages for selected parameters of the interplanetary magnetic field, 
solar wind plasma, and spacecraft trajectory from Pioneer Venus Orbiter (PVO). The data 
were taken when PVO was outside the bow shock of the Venusian ionosphere and was in the 
solar wind. Interval used for averaging is 20 min.                                    
 
The PI of Solar Wind Plasma Analyzer (OPA) is Aaron Barnes at NASA Ames Research Center, 
and the PI of Magnetometer (OMAG) is Christopher Russell at UCLA.

First time         =  1978 DEC  6  00:00:00.000                       
Last time          =  1988 AUG  7  10:50:00.000                       
Missing data or bad data are flagged by 1e32. 
 
The variables in pioneervenus_merged_solar-wind_10m.dat are listed as follows. 

  # NAME      UNITS     
001 UT        SEC       
002 BX VSO    NT        
003 BY VSO    NT        
004 BZ VSO    NT 
% vector magnetic field in Venus Solar Orbital (VSO) coordinates       
005 BT        NT        
006 VSOX      RV        
007 VSOY      RV        
008 VSOZ      RV 
% X, Y, Z position of PVO in VSO coordinates       
009 SCLT      DEG       
010 SCLN      DEG       
% the latitude and longitude of PVO in the solar ecliptic (SE) coordinates            
011 ELN       DEG       
% the longitude of Earth in the solar ecliptic coordinates          
012 RSUN      AU        
013 ION VEL   KM/SEC    
014 ION DENS  #/CC      
015 ION TEMP  DEG K     
                                                                

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SPDF Contact: Lan Jian <lan.jian@nasa.gov>,
 
Please acknowledge the Pioneer Venus mission, instrument PIs (Drs. C.T. 
Russell and A. Barnes), and NASA's Space Physics Data Facility for data usage.

Authorizing NASA Official: 
Dr. R.M. Candey, Head, SPDF, NASA Goddard Space Flight Center
    301-286-6707, e-mail:  Robert.M.Candey@nasa.gov
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