# `Sidereon.FrameCatalog.HelmertTransform`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/frame_catalog.ex#L51)

One published Helmert transform catalog entry.

# `t`

```elixir
@type t() :: %Sidereon.FrameCatalog.HelmertTransform{
  from: atom(),
  parameters: Sidereon.FrameCatalog.HelmertParameters.t(),
  provenance: String.t(),
  rates: Sidereon.FrameCatalog.HelmertRates.t(),
  reference_epoch_year: float(),
  to: atom()
}
```

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