ISIS 1 Topside Sounder Ionograms

Description

These ionograms were digitized from the original ISIS-1 7-track analog telemetry tapes using the facilities of the former Data Evaluation Laboratory at the NASA/GSFC. This data restoration project is headed by Dr. R.F. Benson (NASA/GSFC). Ionograms were digitized at the rate of 40,000 16-bit samples/sec. This sample rate is higher than the Nyquist frequency of 30 kHz. The sample frequency of 40 kHz provides a measurement every 25 microseconds corresponding to an apparent range (c*t/2) interval of 3.75 km. Each ionogram consists of a fixed-frequency and and a swept-frequency portion. The time resolution between ionograms is typically 29 seconds.

Resources

Name Format Description Link
21 isis-status.html https://nssdc.gsfc.nasa.gov/space/isis/isis-status.html
5 https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1969-009A-01

Tags

  • akr
  • upper-hybrid-noise-band
  • plasma-resonance
  • ducted-echoes
  • waves-active
  • fixed-and-swept-frequency-sounder
  • fai
  • ionospheric-echoes
  • wave-scattering
  • topside-ionosphere
  • plasma-waves
  • ionospheric-reflections
  • ground-echoes
  • solar-type-iii-bursts
  • field-aligned-irregularities
  • topside-sounder
  • spectrum-ionogram
  • ground-reflections

Topics

Categories