ISIS 2 Topside Sounder Ionograms

Description

These ionograms were digitized from the original ISIS-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. Ionograms with this sample rate are designated as "full" ionograms because they have the full 3.75 km apparent-range resolution. The ionograms used for most analysis, and those available from CDAWeb, were produced by averaging every four samples of the sounder-receiver video amplitude output to yield an average value every 100 microseconds corresponding to an apparent-range resolution of 15 km. These ionogram files are referred to as "average" files with standard resolution. Each ionogram consists of a fixed-frequency and and a swept-frequency portion. The time resolution between ionograms is typically 14 or 22 seconds depending on the frequency sweep range.

Resources

Name Format Description Link
5 ftps://spdf.gsfc.nasa.gov/pub/data/isis/topside_sounder/ionogram_cdf/isis2/
5 https://spdf.gsfc.nasa.gov/pub/data/isis/topside_sounder/ionogram_cdf/isis2/
5 https://cdaweb.gsfc.nasa.gov/sp_phys/
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Ahmedabad/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/AscensionIsland/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Brazzaville/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Fairbanks/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/FalklandIslands/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Johannesburg/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Kashima/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/KerguelenIsland/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Kourou/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Kwajalein/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/LasPalmas/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Lauder/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Orroral/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Ottawa/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Ouagadougou/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS1/SFS/AverageIonogram/Quito/PT29S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/ResoluteBay/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Santiago/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Sodankyla/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/SyowaBase/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/TerreAdelie/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Tromso/PT22S
5 https://hpde.io/NASA/NumericalData/ISIS2/SFS/AverageIonogram/Winkfield/PT22S
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=1971-024A-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