On 01/20/19 12:51, Arthur Feller, W4ART wrote:
Remember to check the RR 5.282.
RR 5.282 In the bands *435-438MHz*, 1260-1270MHz, 2400-2450MHz, 3400-3410MHz (in Regions2 and3 only) and 5650-5670MHz, *the amateur-satellite service may operate subject to not causing harmful interference to other services operating in accordance with the Table (see No. **5.43**).
Art-
Good point, but does the telemetry on the CZ-4B use an amateur radio callsign? If not, then perhaps it is part of the China aeronautical radio-navigation service:
5.279A "The use of the frequency band 432-438 MHz by sensors in the Earth exploration-satellite service (active) shall be in accordance with Recommendation ITU-R SA.1260-1. Additionally, the Earth exploration-satellite service (active) in the frequency band 432-438 MHz shall not cause harmful interference to the aeronautical radionavigation service in China."
I'm certainly not defending the use of our spectrum for commercial telemetry, but both China (region 3) and the USA (region 2) are in the Amateur secondary allocation on 70cm. We have to expect some interference on this band.
--- Zach N0ZGO