Function decodeSurveillanceStatus

decodeSurveillanceStatus(rawStatus: number): SurveillanceStatus | undefined
Decodes the 2-bit Surveillance Status (SS) subfield of an ADS-B airborne position message (type codes 0, 9-18, and 20-22).
Parameters
- rawStatus: number
  The raw 2-bit field, 0-3.
Returns SurveillanceStatus | undefined
The decoded status, or undefined for a value outside 0-3, which a 2-bit field cannot hold.
- Defined in mode-s/src/surveillance-status.ts:18