[amsat-bb] Illegal downlink in the 70 cm band

Zach Metzinger zmetzing at pobox.com
Sun Jan 20 18:35:46 UTC 2019


On 01/20/19 12:07, Nico Janssen wrote:
> 
> A Chinese CZ-4B rocket booster or, more likely, some payload
> attached to it, appears to have a telemetry downlink on
> 432.0836 MHz. It is object 43656, 2018-081B.

Illegal? Depends on the ITU region it is flying over.

U.S. 47 CFR 97.207(c)(1) defines 435-438 MHz as the allowable transmit 
frequencies for space stations. However, the ITU just marks 432-438 as 
AMATEUR (primary region 1) or Amateur (secondary regions 2&3). No 
distinction is made for amateur-satellite stations.

The ITU does allocate this swath of spectrum to "Earth 
exploration-satellite (active)". I haven't dug into that.

Unfriendly and uncoordinated? Definitely.

IANAL

--- Zach
N0ZGO


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