We either continue to totter at the brink of a global financial precipice, or we sit crumpled on the canyon floor far below, peering skyward, wondering what might have been, and resolving to pick up what pieces we can and carry on. It is impossible to tell as this magazine goes to press in December just where we may find... read more
Based upon lessons learned from the LightSquared situation, the author identifies important considerations for GPS spectrum interference standards, recommended by the PNT EXCOM for future commercial proposals in bands adjacent to the RNSS band to avoid interference to GNSS. read more
A Civilian GPS Position Authentication SystemWhen a GPS receiver reports its position to a monitoring center using a radio signal of some kind, how do we know that the receiver or its associated communications unit is telling the truth? It’s not that difficult to generate false position reports and mislead the monitoring center into believing the receiver is located elsewhere — unless an authentication procedure is used. In this month’s column, we look at the development of a clever system that uses the concept of supplicant and authenticator to assess the truthfulness of position reports. read more
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