P.1409 : Propagation data and prediction methods for systems using high altitude platform stations and other elevated stations in the stratosphere at frequencies greater than about 700 MHz

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P.1409 : Propagation data and prediction methods for systems using high altitude platform stations and other elevated stations in the stratosphere at frequencies greater than about 700 MHz

Recommendation P.1409-4 (09/2025)

Approved in 2025-09-01

Status : In force (Main)

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2025-09-14

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2025-09-14