Proposal to Ban all 300-2000 MHz Transmissions in SZM

Proposal to ban all radio transmissions between 300 MHz and 2000 MHz in the area designated the Shielded Zone of the Moon (SZM), this would also be applicable to Mars

The spectrum would instead be used for radio astronomy operations, this would mean the Amateur Satellite Service allocations at 435 MHz and 1260 MHz would no longer be available to spacecraft in Lunar orbit such as Lunar-OSCAR 93 and Lunar-OSCAR 94 (Longjiang-1 and 2)

The frequencies of the spectral lines of astrophysical interest are:

• 327.4 MHz hyperfine transitions of the deuterium atom

• 1,420.4 MHz neutral hydrogen (HI) line

• 1,612.2 MHz OH radical line

• 1,665.4 MHz OH radical line

• 1,667.4 MHz OH radical line

• 1,720.5 MHz OH radical line

More info - https://amsat-uk.org/2018/05/19/dslwp-satellites-lunar-orbit/