Ionospheric observations have been carried out in Japan since the 1930s using vertical sounding ionosondes. The ionosondes produce ionograms, which are recorded digitally and graphically on 35mm film, and data is collected from stations via an ISDN network. The ionograms are processed automatically into numerical values and summary plots, with manual scaling performed by specialists at the Kokubunji station.
Use Cases
- Modeling ionospheric layer variations based on vertical sounding data.
- Analyzing long-term space weather trends using observations dating to the 1930s.
- Comparing automatically scaled ionogram parameters with manually scaled supplements from specialists.
- Studying regional ionospheric characteristics over Japan using data from multiple stations.
Strengths
- Observations span a long temporal range, beginning in the 1930s.
- Data collection involves both automated processing and manual scaling by experienced specialists.
- Ionograms are captured in dual formats: digital records and 35mm photographic film.
Limitations
- Column-level documentation is absent; field semantics must be inferred after download.
- Row count is unknown, which may limit suitability assessment.
- Last update date is unknown; freshness unverified.
Provenance
- Source
- SCIOPS
- Collection Method
- Data is gathered via vertical sounding ionosondes at stations in Japan, transmitted via ISDN network, and processed automatically with manual supplementation.
- Time Range
- Observations since the 1930s.
- Geography
- Japan, with specific mention of the Kokubunji station.