Data · collection
HWM Neutral Wind Model from NSSDC
Listed in NASA Earthdata CMR
The HWM87 is an empirical model of the horizontal neutral wind in the upper thermosphere analogous to the MSIS model for neutral temperature and density.
Description
It is based on wind data obtained from the Atmosphere Explorer E and Dynamics Explorer 2 satellites. A limited set of vector spherical harmonics is used to describe the zonal and meridional wind components.
The data base was not adequate to detect solar cycle effects but the model does include magnetic activity effects. Mid- and low- latitude data are reproduced quite well by the model. The polar vortices are present, but not to full detail.
Read the rest (1 more)
Currently the model is intended for winds above 220 km altitude; it does not include altitude variations. The model software provides zonal and meridional winds for specified latitude, longitude, time, and Ap-index. The model code is distributed by NSSDC on magnetic tape, on diskettes for use on PCs, and online on NSI/DECNET.
Links
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214584433-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214584433-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Air Temperature · Not provided · Particle Density · Upper Level Winds
- Inferred from text
- Atmospheric sciences 70%
Provenance · 1 source records, 11 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214584433-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3701 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-temperature/surface-temperature/air-temperature | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/atmosphere/atmospheric-winds/upper-level-winds | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/sun-earth-interactions/solar-energetic-particle-properties/particle-density | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:not-provided | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| 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 |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |