7. Segment Information Government Segment: We design, furnish, install and operate wireless network communication systems, including our SwiftLink® deployable communication systems which integrate high speed, satellite and other wireless, and internet protocol technology with secure Government-approved cryptologic devices. We own and operate secure satellite teleport facilities, resell access to satellite airtime (known as space segment,) and provide professional services including field support of our systems and cyber security training to the U.S. Department of Defense and other government and foreign customers. Commercial Segment: Our hosted and managed services include mobile location-based applications including turn-by-turn navigation, E9-1-1 call routing; that is, customers use our software functionality through connections to and from network operations centers, paying us monthly fees based on the number of subscribers, cell sites, call center circuits, or other metrics. Customers include wireless carrier network operators, Voice over Internet Protocol ( VoIP ) service providers, state and local governments deploying Next Generation 9-1-1 technology, and automotive industry suppliers. Our commercial services and systems enable wireless carriers to deliver location-based information, internet content, and short text messages to and from wireless phones. We earn carrier software-based revenue through the sale of licenses, deployment and customization fees, and maintenance fees, pricing for which is generally based on the volume of capacity purchased from us by the carrier. The estimated fair value for the Navigation reporting unit within the Commercial Segment was adjusted by the $125,703 second quarter impairment charge. The operating results of the microDATA acquisition are integrated into the Commercial Segment. Management evaluates segment performance based on gross profit. We do not maintain information regarding segment assets. Accordingly, asset information by reportable segment is not presented. The