Radiosonde operations can be relocated to accommodate spectrum...

Radiosonde operations can be relocated to accommodate spectrum sharing between a commercial LTE network and other National Oceanic and Atmospheric Administration operations in the 1675-1680 MHz band, said LightSquared attorney John Janka of Latham Watkins in an FCC International Bureau filing (http://bit.ly/1dR8wEI). The findings are from a report conducted by Alion. The report is a result of the special temporary authority granted to LightSquared to use 1670-1680 MHz and 400.15-406 MHz bands for mobile broadband services (CD April 30 p7). Alion provides details of analyses that were conducted in order to assess the viability of relocating National Weather Service radiosonde operations from the 1675 MHz-1683 MHz band to the 400.15 MHz-406 MHz band. The feasibility of such a relocation has been confirmed, the report said. “The analysis has also shown that incumbent systems in adjacent bands will not be impacted by radiosonde operations.” The dynamic analysis showed that co-channel operation of radiosondes with incumbent systems within the 400.15-406 MHz band was, at some sites, more complex, the report said. “As a result, co-channel operation should be avoided.” The report cautioned that the 401-402 MHz segment was deemed unusable for radiosonde operations due to the proliferation of data collection platform within the frequency band.