# ERG Science Center data archive (ISEE, Nagoya University)

**Canonical:** https://apis.io/apis/nagoya/ergsc-data-archive/  
**Provider:** Nagoya University — https://apis.io/providers/nagoya/  
**Base URL:** https://ergsc.isee.nagoya-u.ac.jp/data/ergsc/  
**Documentation:** https://ergsc.isee.nagoya-u.ac.jp/

ERG Science Center data archive (ISEE, Nagoya University) is one of 5 APIs that [Nagoya University](https://apis.io/providers/nagoya/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Research Data, Open Data, Space Physics, CDF, and Arase. The published artifact set on APIs.io includes API documentation.

Open, machine-traversable HTTPS data archive operated by the ERG Science Center at Nagoya University's Institute for Space-Earth Environmental Research (ISEE, formerly STEL). It serves the Arase (ERG) satellite instrument data — att, hep, lepe, lepi, mepe, mepi, mgf, orb, pwe and xep — alongside ground-based observation data, guest datasets and the Conjunction Event Finder archive, in CDF. There is no OpenAPI and no REST contract: the interface is an Apache directory index over a stable path grammar, and it is consumed programmatically by the SPEDAS (IDL) and pySPEDAS (Python) analysis frameworks through the ERG plug-in, which resolves file paths against this host. The Conjunction Event Finder is a set of CGI services on the same host (/cef/geotail.cgi, /cef/cluster.cgi, /cef/akebono.cgi, /cef/reimei.cgi, /cef/tc1.cgi, /cef/tc2.cgi), moved to Nagoya from JAXA/ISAS DARTS in 2013. Verified live 2026-09-01: GET /data/ergsc/ returns 200 with a real index listing cef/, ground/, guest/ and satellite/, and GET /data/ergsc/satellite/erg/ returns 200 listing the ten instrument directories. No spec is generated for it — a directory tree is not a contract, and inventing one would be fabrication.

## Machine-readable artifacts (3)

- **Documentation** — https://ergsc.isee.nagoya-u.ac.jp/data_info/howto.shtml.en
- **Website** — https://ergsc.isee.nagoya-u.ac.jp/
- **SourceCode** — https://github.com/spedas/pyspedas

## Other Nagoya University APIs (4)

- [Nagoya University Shibboleth Identity Provider (GakuNin)](https://apis.io/apis/nagoya/identity-federation/)
- [NAGOYA Repository OAI-PMH (NII WEKO3 / JAIRO Cloud tenant)](https://apis.io/apis/nagoya/repo-oai/)
- [ROR registration — Nagoya University](https://apis.io/apis/nagoya/ror-registration/)
- [GakuNin academic access management federation membership](https://apis.io/apis/nagoya/gakunin-federation/)

## Tags

Research Data, Open Data, Space Physics, CDF, Arase, SPEDAS, Satellite

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/nagoya/ergsc-data-archive/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/nagoya/.