For light aircraft, the Geostar Corporation plans to charge a fixed monthly fee in the US $20—$50 range, independent of use. For land transportation, fees will be based in part on transactions. Because the total installed cost of the Geostar space and ground segments is relatively low, these low user fees will provide a comfortable margin of profitability. The Company’s policy is to form contractual arrangements with established service providers. It recognizes that in many areas outside the U.S., access to an RDSS may be subject to national or international arrangements. GLOBAL EXTENSION NEEDED I believe it is urgent to establish, on a world-wide basis, allocations for the frequency bands necessary for radio determination satellite services. It is not necessary to accept a particular system concept, nor the services of a particular company such as the Geostar Corporation. The requirements are few but specific: the 1618- and 2492-MHz bands needed, which were chosen because they are virtually unused, should be made available as single bands, for spread-spectrum use, and not channelized into a multiplicity of narrow bandwidth voice channels as in most of the spectrum. Only with single wide bands, both for the uplink and the downlink to the user transceivers, can a radio determination system — whatever its detailed architecture — achieve high positioning accuracy. In any geographical area where those bands are established, nations can then have, through the Geostar concept or something competitive to it, the services needed. These include the following:
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