ISIS/Alouette Project Poster - 1995 Spring AGU

The Investigation of Electron Density Profiles, Stimulated Plasma Emissions and Natural Radio Emissions Using Digital ISIS 1 and 2 Topside Sounder Ionograms

R F Benson (NASA/GSFC, Laboratory for Extraterrestrial Physics, Greenbelt, MD 20771, 301-286-4037; u2rfb@128.183.10.150)

Presented at the Spring 1995 AGU as paper SM41A-3

Objectives

Produce digital topside ionograms from the analog tapes
Archive in National Space Science Data Center(NSSDC)
NSSDC on-line availability of digital topside ionograms

Significance

Unique long-term observations of:

solar wind/neutral atm energy exchange processes
geophysical phenomena relevant to other space plasmas
signatures of historic atmospheric phenomena

Approach

Select representative ISIS telemetry stations
Determine NSSDC topside-ionogram film inventory
Select desired extension of above
Ship telemetry tapes from Canada to Goddard
Convert analog sounder data to digital topside ionograms
Deposit in NSSDC for on-line availability

Figures

Figure 1. Sample ionogram from ISIS 2(same as seen on top of ISIS page).
Figure 2. Scaled X and O and calculated O mode trace from the above sample ISIS 2 ionogram.
Figure 3. Calculated electron density profile from the scaled X trace from the above sample ISIS 2 ionogram.

Go to the ISIS/Alouette Project Page

For more information about these missions, please contact Dr. Dieter K. Bilitza

NASA Official: J. H. King, king@nssdca.gsfc.nasa.gov