Imaging · collection · 2022
EMIT L1B At-Sensor Calibrated Radiance and Geolocation Data 60 m V001
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/emit/emitl1brad.001
Description
The Earth Surface Mineral Dust Source Investigation (EMIT) instrument measures surface mineralogy, targeting the Earth’s arid dust source regions. EMIT is installed on the International Space Station (ISS) and uses imaging spectroscopy to take mineralogical measurements of sunlit regions of interest between 52° N latitude and 52° S latitude. An interactive map showing the regions being investigated, current and forecasted data coverage, and additional data resources can be found on the VSWIR Imaging Spectroscopy Interface for Open Science (VISIONS) EMIT Open Data Portal.
The EMIT Level 1B At-Sensor Calibrated Radiance and Geolocation (EMITL1BRAD) Version 1 data product provides at-sensor calibrated radiance values along with observation data in a spatially raw, non-orthocorrected format. Each EMITL1BRAD granule consists of two Network Common Data Format 4 (NetCDF4) files at a spatial resolution of 60 meters (m): Radiance (EMIT_L1B_RAD) and Observation (EMIT_L1B_OBS). The Radiance file contains the at-sensor radiance measurements of 285 bands with a spectral range of 381-2493 nanometers (nm) and with a spectral resolution of ~7.5 nm, which are held within a single science dataset layer (SDS).
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The Observation file contains viewing and solar geometries, timing, topographic, and other information related to the observation. Each NetCDF4 file holds a location group containing geometric lookup tables (GLT), which are orthorectified images that provide relative x and y reference locations from the raw scene to allow for projection of the data. Along with the GLT layers, the files also contain latitude, longitude, and elevation layers.
The latitude and longitude coordinates are presented using the World Geodetic System (WGS84) ellipsoid. The elevation data was obtained from Shuttle Radar Topography Mission v3 (SRTM v3) data and resampled to EMIT’s spatial resolution. Each granule is approximately 75 kilometers (km) by 75 km, nominal at the equator, with some granules at the end of an orbit segment reaching 150 km in length.
Known Issues
* Data acquisition gap: From September 13, 2022, through January 6, 2023, a power issue outside of EMIT caused a pause in operations. Due to this shutdown, no data were acquired during that timeframe.
Links
Get the data
- Resource doi.org/10.5067/emit/emitl1brad.001 ↗
The LP DAAC product page provides information on Science Data Set layers and links for user guides, ATBDs, data access, tools, customer support, etc.
landing page · download · DOI / persistent id · from NASA CMR, data nasa gov
- EMIT Level 1B science data system repository. github.com/emit-sds/emit-sds-l1b ↗
documentation · download · from NASA CMR, data nasa gov
- PDF lpdaac.usgs.gov/documents/1570/EMITL1B_ATBD_v1.pdf ↗
The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products.
documentation · download · from NASA CMR, data nasa gov
- Supplement to ATBD (Peer Reviewed Paper) doi.org/10.1016/j.rse.2023.113986 ↗
documentation · download · from NASA CMR, data nasa gov
- Resource youtube.com/playlist?list=PLO2yB4LGNlWrC5NdxeHMxyAxdwQhSypXe ↗
Watch the EMIT Data Tutorial Series Workshops to learn how to discover, access, and work with EMIT datasets.
documentation · download · from NASA CMR, data nasa gov
- Resource github.com/nasa/EMIT-Data-Resources ↗
The LP DAAC GitHub repository provides guides, Python notebooks, and scripts to help users access and work with data from the EMIT mission.
documentation · download · from NASA CMR, data nasa gov
- Resource lpdaac.usgs.gov/search/?query=EMIT&content_types=E-Learning&view=cards&sort=re… ↗
EMIT data E-Learning resources provided by NASA's LP DAAC.
documentation · download · from NASA CMR, data nasa gov
- PDF lpdaac.usgs.gov/documents/1568/EMITL1BRAD_User_Guide_v1.pdf ↗
The technical information in the User's Guide enables users to interpret and use the data products.
documentation · download · from NASA CMR, data nasa gov
- search.earthdata.nasa.gov /search/granules?p=C2408009906-LPCLOUD ↗
Earthdata Search allows users to search, discover, visualize, refine, and access NASA Earth Observation data.
download · from NASA CMR
- appeears.earthdatacloud.nasa.gov ↗
The Application for Extracting and Exploring Analysis Ready Samples (AppEEARS) offers a simple and efficient way to perform data access and transformation processes.
download · from NASA CMR
- Resource earthdata.nasa.gov/centers/lp-daac ↗
The LP DAAC website provides detailed information on discovery, distribution, access, and support of land data products.
download · project · from data nasa gov, NASA CMR
- PNG data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/EMITL1BRAD.001/EMIT_L1B_RAD_001_20240705T004956… ↗
download · preview image · from data nasa gov, NASA CMR
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2408009906-LPCLOUD.iso19115 ↗
download · from data nasa gov
- Resource earth.jpl.nasa.gov/emit ↗
The EMIT website provides detailed information on the EMIT mission, instrument, science, applications, and data.
download · project · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/emit-l1b-at-sensor-calibrated-radiance-and-geolocation… ↗
landing page · from data nasa gov
Catalogue records · 3
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2408009906-LPCLOUD.umm_json ↗
metadata API · from NASA CMR
- CKAN API data.nasa.gov/api/3/action/package_show?id=e3b3dc6f-4584-4c2d-9866-f4f245776… ↗
metadata API · from data nasa gov
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2408009906-LPCLOUD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- Air Quality · Earth Surface Mineral Dust Source Investigation (EMIT) Imaging Spectrometer · Geolocation · Infrared Radiance · International Space Station · Solar Irradiance · Ultraviolet Radiance · Viewing Geometry · Visible Radiance
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Engineering · Ocean & Atmospheric Science · Physics
Provenance · 2 source records, 26 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2408009906-LPCLOUD | 10 d ago | JSON v1 |
| NASA Data Portal | e3b3dc6f-4584-4c2d-9866-f4f245776652 | 7 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| 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:engineering | 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 | |
| concepts[instrument].gcmd_instrument:emit-imaging-spectrometer | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/air-quality | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/infrared-wavelengths/infrared-radiance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/sensor-characteristics/geolocation | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/sensor-characteristics/viewing-geometry | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/ultraviolet-wavelengths/ultraviolet-radiance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/visible-wavelengths/visible-radiance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-activity/solar-irradiance | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[modality].local:modality:imaging | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[platform].gcmd_platform:iss | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |