| Cellocate Beacon Network and Device | GPS and GPS Device |
- availability is near 100%
| - availability is extremely limited in urban settings due to line of sight issues
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- highly accurate where deployed
| - highly accurate when available
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| - expensive airtime charges
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- enabled by low-cost Cellocate Beacon device
| - enabled by expensive GPS receiver and modem
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- terrestrial listening posts are one to ten kilometres away from device
| - satellites are over 22,000 kilometres away from device
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- network calculates location of device
| - GPS receiver inside the device calculates its own position and then a network is required for the device to notify others of its location
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- ownership and control of network is available to interested parties
| - ownership and control of satellites lies with U.S. Department of Defense
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