On-Board Monitoring

          Equipment for On-Board Monitoring

          On-board monitoring system is a portable height monitoring unit based on GPS technology. This equipment collectsGPS location data and pressure altitudeor Mode C data during a monitoring flight. Enhanced GPS Monitoring System(EGMU) developed by the technical center of Federal Aviation Administration (FAA) is a kind of on-board monitoring system and is being used by the China RMA to conduct HKP monitoring. China RMA will import new generation of EGMU (E2GMU) for future monitoring work.

        On-Board Monitoring

        During the monitoring flight, the China RMA will have monitoring engineers to get on board to conduct the monitoring service. The engineerswill communicate with aircrew and set up the EGMU. The EGMU installation location on board is showed below. The EGMU doesn’t need to connect with any on-board equipment since it has an independent power. The EGMU should be installed in the cabin and the antennas should stick on both sides of thecabin window.

         Before the aircraft takes off, the monitoring engineers needs to communicate with the aircrew to obtain transponder code (Mode A) of the aircraft and set up transponder receiver to record the Mode C altitude of aircraft.

         Monitoring engineer should communicate with aircrew in time during the monitoring. The aircraft should maintain straight and level flight for at least 30 minutes in one flight level in the RVSM airspace.

         On-Board Monitoring Application Process

         The China RMA will only provide height monitoring service for aircraft approved at the time of the monitoring flight. The on-board monitoring process including:

         • The operator and fleet should have RVSM operational approval and send approval registration to China RMA;

         • The operator confirms type and number of monitoring aircraft with the China RMA,  andsign a formal monitoring agreement.

         • The operator makes monitoring flight arrangment and submit the flight information to the China RMA before the monitoring flight(s) are conducted.

         • The monitoring engineer(s) of the China RMA conductHKP monitoring on board.

         • China RMA process the data after the monitoring flight.

         • China RMA issues a monitoring report to the operator and sends the result to the responsible CAA authority.

         According to ICAO’s requirement, regions where RVSM is implemented should establish along-term HKP monitoring mechanism. The aircraft height keeping performance monitoring should be a long-term program and the monitoring rate is two years. The operator should know the monitoring results of their fleets, and contact with China RMA every two years to arrange another round of monitoring. Every year, China RMA will update the monitoring plan in time according to the monitoring progress and publish the information to the operators.

         FAQs for On- Board Monitoring

        When doing the on-board monitoring, the monitoring engineerswill install the monitoring equipment in the cabin. To ensure the success and effectiveness of the monitoring withoutinfluenceto the flight operations, the operators need to pay attention to the following aspects:

         • The installation and test of the monitoring equipment need about 20 minutes and should be finished before taking off. For passenger flights, it is suggested that the monitoring engineersget on board twenty minutes before the passenger boarding.

         • The monitoring equipment should be installed in the front part of the cabin for better signals. The antennas should stickon both sides of the cabin windows. It is suggested that all the seats of the row where the EGMU is placed be reserved (including the seat for engineer) for the equipment to avoid effect other passengers.

         • In order to obtain effective data, the aircraft should level off more than 30 minutes in one flight level in the RVSM airspace.

         • In a part of aircrafts like cargo aircraft or some corporate jet, monitoring equipment may be not able to receipt signal in the passenger cabin. In this condition, the equipment should be installed in cockpit.

         • Electromagnetic interference and the weather may lead to failure of receiving signal during the monitoring. In that condition, operator should arrange doing monitoring again on another aircraft within the monitoring group.