# `Sidereon.FrameCatalog.HelmertRates`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/frame_catalog.ex#L36)

Helmert parameter rates in the published table units.

# `t`

```elixir
@type t() :: %Sidereon.FrameCatalog.HelmertRates{
  rotation_mas_per_year: Sidereon.vec3(),
  scale_ppb_per_year: float(),
  translation_mm_per_year: Sidereon.vec3()
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*