Tel: +973 17 329054


The Enhanced Generation 2 GPS-based Monitoring Unit (E2GMU)

Aircraft RVSM Monitoring toolkitAircraft RVSM Monitoring toolkit
Aircraft RVSM Monitoring toolkit
Aircraft RVSM Monitoring toolkit

The E2GMU contains a GPS receiver, two portable shielded GPS antennas, and an Altitude Recording Device (ARD) to capture Mode-C data emitted by the aircraft's transponder. These components are contained within a case that meets airline standards for carry-on luggage. The E2GMU is considered a Portable Electronic Device and requires no STC for installation.

The E2GMU receives GPS radio signals via Two (2) GPS antennas that are placed on aft and starboard interior aircraft windows and secured with suction cups. The E2GMU GPS receiver is calibrated for positional accuracy during the installation inside the aircraft while the aircraft is stationary on the ramp. The Altitude Recording Device (ARD) is calibrated by the operator by entering the 4 digit Transponder Code of the target aircraft to be monitored for RVSM performance. After the RVSM Monitoring flight is completed, MIDRMA uses a Differential GPS Corrections software method to correct errors in the E2GMU GPS data.

E2GMU Monitoring

The E2GMU supports the GPS-Based Monitoring System (GMS) by providing an on-demand means for operators to satisfy their RVSM monitoring requirements and is rapidly and transparently installed onboard aircraft without impact to aircraft systems and flight crews in the performance of their duties. Typical installation of the E2GMU requires a set up time of less than 15 minutes to temporarily install the equipment and place GPS antennas in the cabin or aft cockpit windows to permit data collection. The E2GMU and its components are battery powered.

RVSM Monitoring Flight Options/Procedures

Monitoring may be conducted on scheduled, ferry, or special test flights. The goal of monitoring is to collect a GPS data file during straight and level phases of flight while within the RVSM stratum (FL 290-410 inclusive) for approximately 30 minutes.Upon completion of the final altimetry system error (ASE) results, MIDRMA will provide the results of the monitoring flight to the Operator and operator’s State Authority.






Tel: +973 17 329054

Email: midrma(@)

P.O. Box 50468

Kingdom of Bahrain

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