# `Sidereon.SourceLocalization.Residual`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/source_localization.ex#L106)

Solver residual associated with a sensor row.

`reference_sensor_index` is `nil` for ToA and set for TDOA residuals.
Residuals are seconds.

# `t`

```elixir
@type t() :: %Sidereon.SourceLocalization.Residual{
  reference_sensor_index: non_neg_integer() | nil,
  residual_s: float(),
  sensor_index: non_neg_integer()
}
```

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