Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • THEMIS GBO All Sky Imager at Yellowknife, NT, Canada. ASI Thumbnails Data.

    Metadata Updated: February 20, 2026

    THEMIS Ground All Sky Imager at Yellowknife (62.52 deg GLat, 245.69 deg GLong): 32 x 32 pixel thumbnails for full ASI images. The ASI stations monitor a 170 degree field of view imaging the auroral oval at kilometer resolution. The ASI is comprised of a fisheye lens and CCD in a stainless steel enclosure topped with a transparent acrylic dome. The CCD has a resolution of 256 x 256 pixels. Exposure control ranges from 5 s to 1 ms although the typical data rate is one image every 3 seconds. Silicone heaters keep the instrument within the nominal temperature range. During daylight hours sun shades deploy to protect the CCD.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date February 20, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date February 20, 2026
    Publisher THEMIS Data Repository at Berkeley
    Maintainer
    Identifier https://doi.org/10.48322/bvgj-1440
    Data Last Modified 2026-02-17
    Category Heliophysics
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 6205285a-bc9b-4e3d-9a12-bff8e78a68c6
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.48322/bvgj-1440
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash b87dfe49d5ca64c83797b21a2bb4464dde9d7506ec8a302bb3e33008f22124c9
    Source Schema Version 1.1
    Temporal 2008-03-01/2008-10-22

    Didn't find what you're looking for? Suggest a dataset here.