Alouette-2 Topside Sounder Ionogram Data

Description

These ionograms were digitized from the original Alouette 2 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. The ionograms consist of swept-frequency operation (there is no fixed-frequency operation as in ISIS-1 and ISIS-2). The time resolution between ionograms is typically 31 seconds.

Resources

Name Format Description Link
5 https://spdf.gsfc.nasa.gov/pub/data/alouette/topside_sounder/ionogram_cdaweb/alouette2/
5 https://cdaweb.gsfc.nasa.gov/sp_phys/
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/Fairbanks/PT31S
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/FalklandIslands/PT31S
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/Lima/PT31S
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/Quito/PT31S
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/Santiago/PT31S
5 https://hpde.io/NASA/NumericalData/Alouette2/SFS/AverageIonogram/Winkfield/PT31S
21 isis-status.html https://spdf.gsfc.nasa.gov/isis/isis-status.html
5 https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1965-098A-01
5 ftps://spdf.gsfc.nasa.gov/pub/data/alouette/topside_sounder/ionogram_cdaweb/alouette2/

Tags

  • akr
  • upper-hybrid-noise-band
  • plasma-resonance
  • ducted-echoes
  • waves-active
  • fai
  • swept-frequency-sounder
  • 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