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SW_VOBS_4M_2_
Full product name
Four-monthly time series of vector magnetic field values at fixed locations, on a uniform grid at satellite altitude
Description
Such data, regularly distributed in space and time are suitable for modelling the main geomagnetic field, for core flow inversion studies, and for data assimilation studies of the core dynamo process.
Data Access
- Files
- HTTPS (Product files): https://swarm-diss.eo.esa.int/#swarm/Level2longterm/VOB
- FTP (Product files): ftp://swarm-diss.eo.esa.int/Level2longterm/VOB
- Web services
Output variables
| Variable | Units | Description | Dim | Type |
|---|---|---|---|---|
| Timestamp | - | Time of observation | 1 | CDF_EPOCH |
| Latitude | deg | Geocentric latitude | 1 | CDF_DOUBLE |
| Longitude | deg | Geocentric longitude | 1 | CDF_DOUBLE |
| Radius | m | Radius | 1 | CDF_DOUBLE |
| B_OB | nT | Estimated observed GVO magnetic field, spherical polar (r,theta,phi) vector components [i.e (-C,-N,E) components in NEC frame] | 3 | CDF_DOUBLE |
| sigma_OB | nT | Observed field estimated error | 3 | CDF_DOUBLE |
| B_CF | nT | Estimated core GVO magnetic field, spherical polar (r,theta,phi) vector components [i.e (-C,-N,E) components in NEC frame] | 3 | CDF_DOUBLE |
| sigma_CF | nT | Core field estimated error | 3 | CDF_DOUBLE |
| Timestamp_SV | - | Time of Secular Variation (*_SV) data | 1 | CDF_EPOCH |
| B_SV | nT/yr | Estimated secular variation (SV) GVO magnetic field, spherical polar (r,theta,phi) vector components [i.e (-C,-N,E) components in NEC frame] | 3 | CDF_DOUBLE |
| sigma_SV | nT/yr | Secular variation field estimated error | 3 | CDF_DOUBLE |