# `Sidereon.SourceLocalization.InitialGuess`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/source_localization.ex#L68)

Closed-form seed used to start a source-localization solve.

Position is metres. Origin time and residual RMS are seconds.

# `t`

```elixir
@type t() :: %Sidereon.SourceLocalization.InitialGuess{
  origin_time_s: float() | nil,
  position_m: [float()],
  residual_rms_s: float()
}
```

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