Table · dataset · 2026
ISIS-1 Topside Sounder Average Ionogram over Sodankyla, Finland: SOD, Latitude 67, Longitude 27
Listed in NASA Data Portal
This Ionogram was digitized from the original ISIS 1 Analog Telemetry Data on 7-Track Tape using the Facilities of the Data Evaluation Laboratory at NASA GSFC, Code 500.
Description
This Data Restoration Project is headed by Dr. R.F. Benson, NASA GSFC, Code 692.
Ionograms were digitized at the Rate of 40,000 16-bit samples/s. This Sample Rate is higher than the Nyquist Frequency of 30 kHz. The Sample Frequency of 40 kHz provides a Measurement every 25 ms corresponding to an Apparent Range Interval of c*t/2, where c is the Speed of Light, or 3.747 km.
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Each Ionogram consists of a Fixed Frequency Portion and a Swept Frequency Portion. The Time Resolution is typically 29 s.
Links
Get the data
- Resource spdf.gsfc.nasa.gov/pub/data/isis/topside_sounder/ionogram_cdf/isis1/SOD_67N_027E ↗
download · from data nasa gov
- Resource cdaweb.gsfc.nasa.gov/index.html ↗
download · from data nasa gov
- Resource cdaweb.gsfc.nasa.gov/hapi ↗
download · from data nasa gov
- Resource spdf.gsfc.nasa.gov/isis/isis-status.html ↗
download · from data nasa gov
- Resource nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1969-009A ↗
download · from data nasa gov
- Resource helio.data.nasa.gov/dataset/ISIS1_SFS_AverageIonogram_Sodankyla_PT29S ↗
download · from data nasa gov
- Resource hpde.io/NASA/NumericalData/ISIS1/SFS/AverageIonogram/Sodankyla/PT29S ↗
download · from data nasa gov
- Resource spdf.gsfc.nasa.gov/pub/data/isis/topside_sounder/ionogram_cdf/isis1/SOD_67N_027E ↗
download · from data nasa gov
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/isis-1-topside-sounder-average-ionogram-over-sodankyla… ↗
landing page · from data nasa gov
- DOI doi.org/10.48322/9qaw-s520 ↗
DOI / persistent id · from data nasa gov
Catalogue records · 1
- CKAN API data.nasa.gov/api/3/action/package_show?id=7168f132-d8f5-4fae-a341-c9a727563… ↗
metadata API · from data nasa gov
Topics
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Data Portal | 7168f132-d8f5-4fae-a341-c9a7275638e5 | 8 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /notes |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| title | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /title |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 |