NAMMA HIGH ALTITUDE MMIC SOUNDING RADIOMETER (HAMSR) V1

The NAMMA High Altitude MMIC Sounding Radiometer (HAMSR) dataset consists of data collected by HAMSR, which is a 25-channel microwave atmospheric sounder operating as a cross-track scanner. It operates with three bands: an 8-channel band centered around 50 GHz, used for primary temperature sounding; a 10-channel band centered around 118 GHz, used for secondary temperature sounding and assessment of scattering; and a 7-channel band centered around 183 GHz, used for water vapor (humidity) sounding. The instrument continuously self-calibrates by using internal calibration targets. Radiometric sensitivity at the composite sampling cells provided in the archive is typically 0.1 K and ranges up to 0.25 K for the stratospheric channels. Calibration accuracy is estimated at better than 1 K for temperature sounding and better than 2 K for water vapor sounding. Temperature weighting function peaks are distributed between the surface and the flight altitude. These data files were generated during support of the NASA African Monsoon Multidisciplinary Analyses (NAMMA) campaign, a field research investigation sponsored by the Science Mission Directorate of the National Aeronautics and Space Administration (NASA). This mission was based in the Cape Verde Islands, 350 miles off the coast of Senegal in west Africa. Commencing in August 2006, NASA scientists employed surface observation networks and aircraft to characterize the evolution and structure of African Easterly Waves (AEWs) and Mesoscale Convective Systems over continental western Africa, and their associated impacts on regional water and energy budgets.

Data and Resources

Field Value
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation Lambrigtsen, Bjorn.2006. NAMMA HIGH ALTITUDE MMIC SOUNDING RADIOMETER (HAMSR) [indicate subset used]. Dataset available online from the NASA Global Hydrology Resource Center DAAC, Huntsville, Alabama, U.S.A. DOI: http://dx.doi.org/10.5067/NAMMA/HAMSR/DATA201
graphic-preview-description N/A
graphic-preview-file https://ghrc.nsstc.nasa.gov/pub/fieldCampaigns/namma/HAMSR/browse/
identifier C1625128929-GHRC_CLOUD
issued 2006-06-01
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1625128929-GHRC_CLOUD.html
language {en-US}
metadata_type geospatial
modified 2019-04-16
programCode {026:001}
publisher NASA/MSFC/GHRC
resource-type Dataset
source_datajson_identifier true
source_hash 67d98b94a6991eb34a725ec5cbdf5ff3fa3b3be5
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-84.51, 7.05], [-10.56, 7.05], [-10.56, 42.04], [-84.51, 42.04], [-84.51, 7.05]]]}
temporal 2006-08-15T04:36:52Z/2006-09-12T19:47:26Z
theme {NAMMA,geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • earth-science
  • geo
  • geoss
  • microwave
  • national
  • north-america
  • radar
  • spectral-engineering
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer undefined
maintainer_email support-ghrc@earthdata.nasa.gov
metadata_created 2025-11-21T10:02:11.259561
metadata_modified 2025-11-21T10:02:11.259564
notes The NAMMA High Altitude MMIC Sounding Radiometer (HAMSR) dataset consists of data collected by HAMSR, which is a 25-channel microwave atmospheric sounder operating as a cross-track scanner. It operates with three bands: an 8-channel band centered around 50 GHz, used for primary temperature sounding; a 10-channel band centered around 118 GHz, used for secondary temperature sounding and assessment of scattering; and a 7-channel band centered around 183 GHz, used for water vapor (humidity) sounding. The instrument continuously self-calibrates by using internal calibration targets. Radiometric sensitivity at the composite sampling cells provided in the archive is typically 0.1 K and ranges up to 0.25 K for the stratospheric channels. Calibration accuracy is estimated at better than 1 K for temperature sounding and better than 2 K for water vapor sounding. Temperature weighting function peaks are distributed between the surface and the flight altitude. These data files were generated during support of the NASA African Monsoon Multidisciplinary Analyses (NAMMA) campaign, a field research investigation sponsored by the Science Mission Directorate of the National Aeronautics and Space Administration (NASA). This mission was based in the Cape Verde Islands, 350 miles off the coast of Senegal in west Africa. Commencing in August 2006, NASA scientists employed surface observation networks and aircraft to characterize the evolution and structure of African Easterly Waves (AEWs) and Mesoscale Convective Systems over continental western Africa, and their associated impacts on regional water and energy budgets.
num_resources 9
num_tags 12
title NAMMA HIGH ALTITUDE MMIC SOUNDING RADIOMETER (HAMSR) V1