FTPWeb Browser
to browse data as part of data selection or to create subsetted files
IMP-8 Low Energy Proton and Electron Differential Energy Analyzer (LEPEDEA)

This home page provides access to distribution function and moments (densities,flow speeds) data taken from the University of Iowa LEPEDEA (Low Energy Proton and Electron Differential Energy Analyzer) during many magnetotail passes of the IMP 8 spacecraft (at ~200,000 km). The data are at 3-min. resolution. The ASCII version of this data set (generated at NSSDC from original binary) are placed at NSSDC's anonymous FTP site nssdc.gsfc.nasa.gov in directory spacecraft_data/imp/imp8/plasma_lepedea/ At this directory a user can find a description of the data and the experiment .

Use FORM 1 to get proton or electron distribution function values for different and/or
and moments data, OR use FORM 2 if you only need moments data.

Data are available for only ~260 days for 1978-1986. Click here
FORM 1: Please enter your selections and then click on the Submit button.

    Proton data Electron data

*Select an activity
    Plot data List data Create file (file?)

* Enter date (yyyyddd) according the "Day Availability" table above:   

*Select variables
Word Description Format
05 Xsm (GSM X component of IMP position vector, Re) F7.2
06 Ysm (GSM Y component of IMP position vector, Re) F7.2
07 Zsm (GSM Y component of IMP position vector, Re) F7.2
08 DZFM (distance in Re to the neutral sheet using the Fairfield model) F7.2
09 Density (cm**-3) F7.3
10 Vx (km/s) for Proton data,GSE F7.0
11 Vy (km/s) for Proton data,GSE F7.0
12 DVx (uncertainty in Vx) F7.0
13 DVy (uncertainty in Vy) F7.0
14 ECM(Temperature in eV) E9.2
Distribution Function: Levels/Sectors (words:15-270, format: E9.2)

Sc1Sc2Sc3Sc4Sc5Sc6Sc7Sc8 Sc9Sc10Sc11Sc12Sc13Sc14Sc15Sc16
Lv1
Lv2
Lv3
Lv4
Lv5
Lv6
Lv7
Lv8
Lv9
Lv10
Lv11
Lv12
Lv13
Lv14
Lv15

*Advanced plot selections (optional)

Y-axis Scale:
View Mode: Connect Type:
Paper: Character size(0.5-2.0):
X-Axis style: Y-Axis style:
Plot Symbol: Symbol Size(0.1-4.0):
Color Table(0-40): Image size (pixels): X: Y:
Foreground Color Index: (0-255) Background Color Index: (0-255)

If you have any questions/comments about the FTPWeb Browser, contact Dr. Natalia Papitashvili,Mail Code 672, NASA/Goddard Space Flight Center, Greenbelt, MD 20771
NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility