Table · dataset · 2026
SDO/HMI line-of-sight Dopplergram, 45-Second Data
Listed in NASA Data Portal
Dopplergrams are maps of solar surface velocity.
Description
The HMI (Camera 2) instrument takes 72 filtergrams to construct a single dopplergram. Six filtergrams are taken in six positions across the nominal 6173.3 Å spectral line; each filtergram is taken in two polarization states (right circularly polarized (RCP), or Stokes I-V, and left circularly polarized (LCP), or I+V).
Assuming that the absorption line is a Gaussian and that the HMI filter transmission profiles are delta functions, the Fourier coefficients can be calculated and are then used to estimate the line-of-sight magnetic field strength B.
Links
Get the data
- Resource sdac.virtualsolar.org/cgi/search?time=1&instrument=HMI&spectrum=1&version=current&bu… ↗
download · from data nasa gov
- Resource hmi.stanford.edu ↗
download · from data nasa gov
- Resource doi.org/10.1007/s11207-011-9834-2 ↗
download · from data nasa gov
- Resource helio.data.nasa.gov/dataset/SDO_HMI_LOS_Dopplergram_PT45S ↗
download · from data nasa gov
- Resource hpde.io/NASA/NumericalData/SDO/HMI/LOS_Dopplergram/PT45S ↗
download · from data nasa gov
- Resource jsoc.stanford.edu/ajax/lookdata.html?ds=hmi.V_45s%5B2020-01-01T00%3A00%3A00%2F60… ↗
download · from data nasa gov
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/sdo-hmi-line-of-sight-dopplergram-45-second-data ↗
landing page · from data nasa gov
- DOI doi.org/10.48322/e9dg-yp34 ↗
DOI / persistent id · from data nasa gov
Catalogue records · 1
- CKAN API data.nasa.gov/api/3/action/package_show?id=aa327084-6d0b-4e76-8a38-8d51cc7d2… ↗
metadata API · from data nasa gov
Topics
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Data Portal | aa327084-6d0b-4e76-8a38-8d51cc7d246c | 7 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| 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: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 | |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /notes |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| title | source · data nasa gov | connector:data_nasa_gov@1.0.0 | /title |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 |