Originally Posted by
SASless
If one guy is saying his aircraft data is inaccurate and others are saying the system is accurate but relies upon the aircraft system being accurate.....how do we know the particular aircraft is sending accurate data?
How do you check your own aircraft to confirm it is operating correctly?
Has that been done?
Experience with FAA compliance monitoring of ADS-B Out-equipped aircraft to date has revealed that a large percentage of equipped aircraft have deficiencies with ADS-B Out system performance following initial installations. Many of these deficiencies have been attributed to improper installation and incorrect system configuration.
The FAA provides a free, web-based service called the Public ADS-B Performance Report (PAPR) at
https://adsbperformance.faa.gov/PAPRRequest.aspx. Additional information on the PAPR service can be found at
https://www.faa.gov/nextgen/equipadsb/. The FAA recommends that owner/operators of ADS-B Out-equipped aircraft verify equipment performance through periodic use of the PAPR request service.
Per
§ 91.227 Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment performance requirements, ADS-B Out Performance Requirements for Navigation Accuracy Category for Position (NACP) specifies the accuracy of a reported aircraft's position, as defined in TSO-C166b and TSO-C154c:
(1) For aircraft broadcasting ADS-B Out as required under 91.225 (a) and (b) -
(i) The aircraft’s NACP must be less than 0.05 nautical miles;
(ii) The aircraft’s NACV must be less than 10 meters per second;
Source: AC No: 90-114B Automatic Dependent Surveillance-Broadcast Operations (12/30/2019)