# `Sidereon.GNSS.Fusion.TightGnssObservation`
[🔗](https://github.com/neilberkman/sidereon-ex/blob/main/lib/sidereon/gnss/fusion.ex#L201)

Raw GNSS observation for one satellite in a tight update.

# `t`

```elixir
@type t() :: %Sidereon.GNSS.Fusion.TightGnssObservation{
  carrier_phase:
    Sidereon.GNSS.Fusion.TightCarrierPhaseObservation.t() | map() | nil,
  ionosphere_delay_m: number(),
  pseudorange_m: number(),
  pseudorange_sigma_m: number(),
  range_rate: Sidereon.GNSS.Fusion.TightRangeRateObservation.t() | map() | nil,
  satellite_id: String.t(),
  troposphere_delay_m: number()
}
```

# `new`

```elixir
@spec new(String.t(), number(), number(), keyword()) :: t()
```

Build a tight GNSS observation.

---

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