Dynamics Explorer-2 (DE 2) Ion Drift Meter (IDM) Data

This directory gathers data for the IDM instrument that flew on the DE 2 spacecraft 
which was launched on 3 August 1981 into an elliptical orbit with an altitude range 
of 300 km to 1000 km and re-entered the atmosphere on 19 February 1983. 

The directory includes the following files:

format_description_ASCII: Format description of ASCII data. The same parameters are also
	included in the CDF data files.
SFDU_description_binary: The SFDU description of the format of the original binary data
SFDU_description_experiment: The SFDU description of the instrument and DE mission

The directory includes the following sub-directories:

/vi_250ms_ascii   (NSSDC ID: 81-070B-06D)
This data set provides the cross track ion drift with a time resolution of 125 milli-
seconds for the time period from Aug 15, 1981 to Feb 16, 1983. The ASCII version 
was generated at NSSDC from the originally PI-submitted binary data. The data are 
provided in daily files (yydddhhmm_IDM_DE_250MS_Vnn.ASC). The following links 
provide access to data set documentation and software:

/vion250ms_cdaweb
The same data in CDF. They can be also plotted, listed and downloaded through CDAWeb at 
http://cdaweb.gsfc.nasa.gov/

The IDM data are also available at 16-second time resolution in the UA directory at
<http://spdf.gsfc.nasa.gov/pub/data/de/de2/combined_plasma_neutrals_ua/>
The 16-second UA data are also available on ATMOweb for plotting and analysis at 
<http://omniweb.gsfc.nasa.gov/ftpbrowser/atmoweb.html>

Please acknowledge the NASA Space Physics Data Facility and the instrument's 
Principal Investigator for data usage.

Keywords: Sun-Earth Connections, space physics, magnetosphere, ionosphere

Data contact: Dieter.Bilitza-1@nasa.gov>
NASA Official: Dr. Robert McGuire <robert.e.mcguire@nasa.gov>