Number	Aircraft Type	Speed	Range	Ceiling	Capacity
1	Cessna Conquest	310 mph	2400 mi	35,000 ft	4,300 lbs
1	Piper Navajo	205 mph	1100 mi	25,000 ft	1,900 lbs
1	Piper Chieftain	190 mph	1100 mi	25,000 ft	1,900 lbs
4	Cessna 320	210 mph	1100 mi	28,000 ft	1,800 lbs
5	Cessna T310	210 mph	1100 mi	28,000 ft	1,800 lbs
1	Piper Aztec	180 mph	1000 mi	25,000 ft	1,700 lbs
1	Cessna 206	140 mph	700 mi	18,000 ft	1,600 lbs

All Keystone aircraft have airframes that are modified to accomodate the optical requirements of most sensors. Standard installed equipment includes precisely surveyed GPS antennas capable of receiving highly accurate positional signals for use in the acquisition of airborne data. Additionally, each aircraft is equipped with a flight management system, which provides precision navigation guidance to flight crews during data collection, as well as functionality for project management and data logging.

Sensor platforms are supplemented with a combination of additional equipment including stabilized mounts, dual frequency GPS receivers, and inertial measurement units. Keystone currently operates Leica PAV-30 mounts, Novatel and Trimble Airborne GPS units, and Applanix GPS/IMU logging systems.

Keystone has its own maintenance facility located at its headquarters in Philadelphia. Full-time mechanics keep aircraft maintained and ready for each mission, helping to ensure the safety and efficiency of every collection. When aircraft are deployed on projects, routine and unscheduled maintenance is coordinated with local mechanics to minimize downtime.

While Keystone's main base of operations is located in Philadelphia, PA, aircraft are routinely deployed on projects across the U.S. and North America. Benson, AZ serves as a remote base of operation for regional operations, and flight crews are highly experienced at establishing temporary bases of operation wherever a project requires. This allows Keystone to offer consistent, dependable service anywhere.

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