The Chair of IARU Region 1 Spectrum Affairs, Barry Lewis G4SJH, reports on the work being done in defending the interests of the Amateur Services in the 1240-1300 MHz band.
His IARU Region 1 post reads:
IARU is continuing to represent the amateur services interests in the 23cm band Galileo/GLONASS radio navigation satellite service coexistence discussions in the CEPT project teams.
The most recent CEPT SE40 project team meeting was held from 24th to 26th March 2021 and the IARU R1 was represented by Barry Lewis, G4SJH (Region 1 SRLC chair). At that meeting the first coexistence calculations were introduced by one CEPT administration, based on some initial assumptions about the amateur service operation. The IARU is continuing to work with the regulators to refine the details of these assumptions and make them and the calculations more representative of typical amateur station characteristics and band usage. These first calculations are considered only as a starting point and the meeting agreed that further work is needed to develop the calculations into a more comprehensive study.
Measurement campaigns have shown that the potential for coexistence depends very much on the frequency of the amateur service transmissions in the 23cm band with respect to the RNSS receiver bandwidth. This aspect needs to be considered more carefully once the initial scenarios and calculations are agreed.
In addition the IARU continues to have questions about the protection criteria required by the RNSS receivers and in particular how they relate to RNSS operational and service provision behaviour. IARU has ensured alignment of the amateur and amateur service information being used in CEPT with that being used in the parallel work in the ITU‑R relating to WRC-23 AI 9.1b.
Source IARU Region 1 https://iaru-r1.org/
The meeting Input paper “Amateur versus RNSS, interference areas” that was submitted by France as well as other meeting documents can be downloaded from
https://cept.org/ecc/groups/ecc/wg-se/se-40/client/meeting-documents/?flid=28532
source:AMSAT
Antenna
The CDAA Antenna and the Wullenweber
A CDAA of which the Wullenweber is a type, consists of a group of omnidirectional antennas symmetrically spaced about the periphery of a circular ref… Read more
ARRL’s Portable Antenna Classics
Portable Antenna Classics Antennas for Operating On the Go! Portable operating is gaining popularity in the Amateur Radio community. For amateurs who… Read more
New! Bonito Loop ML-200
The Bonito ML-200 is a wide band active antenna for reception of long, medium and short waves as well as the lower VHF band. The antenna is is charact… Read more
Antenna experiment – Fractal Quad for 28 Mhz band
“After reading many antenna articles in the Internet and a couple ARRL antenna books I got interested in physically small HF antennas. My… Read more
Review
Apache Labs Anan 8000DLE at ML&S – Overview
The ANAN-8000DLE HF & 6M 200W SDR Transceiver meets and exceeds the requirements of even the most discerning Amateur Radio Operator, it is based o… Read more
Measure length of coax, etc. with your scope, a battery and a resistor – simple TDR
Measure length of coax, etc. with your scope, a battery and a resistor – simple TDR Read more
Getting the Sidebands Mixed Up Creates Audio Garbage
Roger Nielsen, K7PUG, is having trouble with his Elecraft K3 after a factory reset. Everything sounds garbled and won’t tune in. Let’s tro… Read more
Equipment
Newly released receiver Icom IC-R 8600 compatible with digital wave
IC-R 8600 Broad band of 10 kHz to 3 GHz Product name / type name Communication receiver / IC – R 8600 Suggested retail price 228,000 yen + tax… Read more
OMEGA- Portable radio
Frequency coverage (MHz) Rx 0.100 – 72.000 Tx 1.800-2.0007.000-7.200 18.068-18.168 28.000-30.000 3.500-3.80010.100-10.150 21.000-21.450 50.000-52.000… Read more
Hambuilder HBR4HF 4 Band HF Transceiver
HBR4HF specification Heterodyne 10MHz Xtal filter exciter based on Hambuilder BritX exciter 300-25000Hz audio band pass active filter using NE5532 4 B… Read more
A $38.99 RTL-SDR with 100 Khz – 1.7 GHz coverage
RTL-SDR 100Khz-1.7GHz Full Band UV HF RTL-SDR USB Tuner Receiver/ R820T + 8232 Ham Radio 100% Brand New And High Quality Using the RTL2832 idle chann… Read more
A-iPower Portable Generators SUA8250E
Portable Generators Get power where you need it using one of these A-iPower portable generators. They are driven by a compact, high performance, air-c… Read more
News
How to Hang Ladder Line
Tim , KJ4ZJ, wants to know if Ladder Line can be hung at an angle without affecting performance. Read more
Amateur Radio Credited with Rescue of Back-Country Hiker in Tennessee
A back-country hiker was rescued from Great Smoky Mountains National Park with assistance from amateur radio after she became exhausted on the trail a… Read more
Icom AH-705 in the Park with Ray – N9JA, Tommy – N5ZNO, and George – W5JDX.
A closer look at the Icom AH-705. A QRP antenna tuner for the IC-705 Trasnceiver. Tunable 50Ω antenna and long wire antenna designed for field operati… Read more
New FCC RF safety rules for ham radio – May 2021
New FCC RF safety rules for ham radio #hamradio – May 2021 Read more
The post Recent activity on the 23cm band RNSS Coexistence Studies appeared first on QRZ NOW – Ham Radio News.