Concept
Dilution of precision of position {GDOP} by high frequency radar and computation using equations from Chapman et al. (1997)
| URI | http://vocab.nerc.ac.uk/collection/P01/current/HFRGDOP1/1/ | ||
|---|---|---|---|
| Within Vocab | BODC Parameter Usage Vocabulary | ||
| Alternative Labels | HFR_GDOP | ||
| Definition | The Dilution of Precision (DOP) or Geometric Dilution of Precision (GDOP) is the coefficient of the uncertainty which relates the uncertainties in radial and velocity vectors. Originally used in satellite navigation but here adapted to the geometry of radial sites. It is a key index to optimize the configuration and to assess the positioning precision. First defined in Chapman et al, (1997) On the accuracy of HF radar surface current measurements: Intercomparisons with ship-based sensors. Journal of Geophysical Research Atmospheres 1021(C8):18737-18748. | ||
| Date | 2025-11-26T17:27:59 | ||
| Identifier | SDN:P01::HFRGDOP1 | ||
| Note | accepted | ||
| Is Version Of | HFRGDOP1 | ||
| version | 1 | ||
| Broader | S06:S0600236 |
Dilution of precision | |
P02:RFVL |
Horizontal velocity of the water column (currents) | ||
S29:PE001574 |
position | ||
| Related | S05:S050284 |
computation using equations from Chapman et al. (1997) | |
P06:UUUU |
Dimensionless | ||
S04:S041076 |
high frequency radar | ||
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