Novi Postovi

 Str: [1] 2 3 ... 10
1
Microwave / Odg: Novi Meteo radar u Medulinu
« Zadnji post 9A1Z Danas u 13:04:05 »
Radar je ponovno proradio.
2
EME / Odg: EME far na 10GHz
« Zadnji post 9A5AA Jučer u 21:46:14 »








Per DK7LJ je danas objavio ovo:

hi

the 10ghz beacon is repared and instaled. the repare of the pa was done
by charlie g3wdg.
after instaling ,i  tried to switch on the beacon, but the water cooling
system did not work. putting away the cover  i noticed a bird with 5 very
young, still naked children meanwhile had thier home inside. i will make
a photo and post it. i am afraid i have to wait still they have left
their home  may be in one additional month.
3
Microwave / Odg: Novi Meteo radar u Medulinu
« Zadnji post s52ei 20. Srpanj. 2019, 20:04:33 »
Neznam Madžarski, pa gledam ovdje https://www.idokep.eu/idojaras/Rijeka
Kad gledam ovaj http://www.arso.gov.si/vreme/napovedi%20in%20podatki/radar_animacija.html skoro je isto, samo što je naš malo u delayu.
lp, Ivan/S52EI
4
Novosti / Novi IARU R1 VHF handbook 2019
« Zadnji post 9a2ga 19. Srpanj. 2019, 09:43:57 »
Nisam službeno zadužen niti je moja briga ali evo da Vas informiram da je izašao novi IARU R1 VHF handbook:

https://www.iaru-r1.org/index.php/downloads/func-startdown/1018/

73 de Boris 9A2GA
5
Microwave / Odg: Novi Meteo radar u Medulinu
« Zadnji post 9A1Z 18. Srpanj. 2019, 21:16:32 »
Izgleda da radar Medulin ne radi ...
6
Microwave / Odg: Novi Meteo radar u Medulinu
« Zadnji post 9A4CW 18. Srpanj. 2019, 17:30:22 »
Čini li se meni samo, ili je radar promijenio
područje koje pokriva?

https://www.idokep.hu/adria

Prije je ovaj svijetliji krug bio na moru i u Italiji.
Slavonija je bila u sjeni.
Sada je obrnuto?

Pozdrav društvu, 9A4cw, Dejan
7
Sateliti / Odg: GEO
« Zadnji post 9A1Z 16. Srpanj. 2019, 13:50:27 »
Kao najbolji završetak mojeg mini  serijala o QO-100 prilažem QSL-ku   i prigodan poklon koji sam dobio za vezu preko QO-100.

Veza sa rubnog područja dosega satelita, slike govore same za sebe...


Pozdrav svim mikrovalcima  1z
8
Obavijesti / Odg: 2 m band u opasnosti
« Zadnji post 9A4OE 13. Srpanj. 2019, 17:53:57 »
O dva metra zasad ni riječi.

 CPG PTA 7
Prague, 17th - 21st June 2019

Date issued:    4th June 2019
Source:    IARU Region 1
Subject:    RNSS Proposal WRC-19 AI 10
Group membership required to read? (Y/N)



Summary:

CPG meeting # 8 considered a WRC-23 agenda item proposal in document CPG(19)088 (RNSS and Amateur service in 1240-1300 MHz) and tasked PTA to consider the matter further. The proposal invites a review and ITU-R studies "…leading to technical, regulatory and operational recommendations to the Conference, enabling that Conference to decide on effective measures to ensure the protection without undue constraints of RNSS (space-to-Earth) receivers by the amateur and amateur-satellite services".
At its last meeting PT44 in WG-FM also considered reports and preliminary studies (previously presented in PTA) on the susceptibility of RNSS receivers in the band 1240-1300 MHz to interference from the amateur service in the same range. Since the CPG meeting the IARU has continued to express support for a proposal made to WG-FM meeting #94 (FM(19)081-A6) following which WG-FM asked PT44 to continue to work on the topic in conjunction with WG-SE. IARU believes that the preliminary studies presented to CEPT (WG-FM, PTA and FM PT44) already offer good potential for developing opportunities for effective protection of the RNSS receivers.
At this time the IARU believes that WRC action would be premature and requests that it is not supported as a proposal for the WRC-23 agenda.


Proposal:
For now, the IARU believes that WRC action on this topic is premature. The documentation provided to date reports only one interference issue with a specific amateur application experienced at a Galileo control centre rather than in user devices. There is little knowledge about the characteristics of realistic deployment scenarios for user devices, how susceptible they might be to transmissions from other services in the field and how likely they are to experience interference from the Amateur service in the field. Proper account needs to be taken of the operational characteristics of the Amateur service in order to develop sensible and proportionate measures that will facilitate the continued utility of the band for amateur experimentation whilst respecting the primary status of the RNSS service.

The IARU respectfully requests that administrations do not support a WRC AI proposal at this time to allow:
a) Technical and regulatory studies in ECC WG-FM and SE to be finalised that can take into account a more complete understanding of the real likelihood for interference to user RNSS receivers in the field considering the propagation environments and operational characteristics of both services.
b) Time for gaining operational experience in the effectiveness of any regulatory measures that may be developed. 

Background:
The International Amateur Radio Union (IARU) represents the interests of amateur radio experimenters and operators worldwide. Amateur radio provides the possibility for people of all ages, gender and nationalities to gain practical hands on experience through the nationally regulated use of radio spectrum for the study and understanding of terrestrial and space wireless communications.  Indeed many radio amateurs who experienced amateur radio communications in their youth have used the skills gained for their technical and/or scientific careers in later life. (See: https://www.iaru-r1.org/index.php/web-links-sp-999616743).
The international amateur radio community has followed with great interest the successful implementation of European GNSS systems, in particular GALILEO.  The IARU understands and recognises the great opportunities that the system offers to Europe and the World at large. According to recent information one of  Galileo’s next major steps is the active utilisation of the GALILEO E6B/C signal offering dual-frequency accuracies (E1/E6) and a commercial service in the frequency range  1 260-1 300 MHz. This range sits within the global 1 240 – 1 300 MHz Amateur Service allocation in the international Radio Regulations (as well as other services).
This frequency range has been used for many years for technical investigations and experimental use by amateur stations for a range of applications. It is an important band for the Amateur Service as it sits at the boundary between lower frequency UHF and VHF bands for which there is a good supply of commercial equipment and the higher frequency microwave bands that require a greater degree of self-provision and experimentation. It is the technical challenge of this latter requirement that drives the interest and self-training in the use of these frequencies.
As a consequence of the importance of the band for the Amateur Service and the opportunities for coexistence suggested by the technical measurement campaigns reported by the German administration and the European Commission JRC, the IARU has spoken against the WRC-23 agenda item proposals made in the European WRC preparatory process (taking place in CPG PTA).  IARU believes that a WRC agenda item is not the most efficient means to develop the solutions and guidance to solve any coexistence issue between the GNSS and the Amateur Service. In modern times the limited radio spectrum resource has become more apparent as new applications and technologies make use of ever higher frequencies and there has been a growing emphasis on increased spectrum sharing to facilitate opportunities for all spectrum users where possible. The European Commission itself supports this approach in several cases through measures adopted under the Radio Spectrum Decision (Decision No 676/2002/EC of the European Parliament and of the Council of 7 March 2002 on a regulatory framework for radio spectrum policy in the European Community).
IARU is ready and willing to participate and contribute towards the development of appropriate and proportionate measures within the CEPT working groups that can facilitate successful coexistence that build upon the good work reported in the studies mentioned above.

9
Obavijesti / Odg: 2 m band u opasnosti
« Zadnji post 9A4OE 13. Srpanj. 2019, 17:49:22 »
European Common Proposals
PROPOSALS FOR THE WORK OF THE CONFERENCE


ADD   EUR/9AXX/4

DRAFT NEW RESOLUTION [EUR-B10-2] (WRC-19)
Studies on frequency-related matters, including possible additional allocations, for the possible introduction of new non-safety aeronautical mobile applications.
The World Radiocommunication Conference (Sharm el-Sheik Egypt, 2019),

   considering
a)   that the number of manned and unmanned aircraft equipped with sensors has grown significantly in the past 20 years;
b)   that the need for bidirectional low to high data rate communications between aeronautical stations and aircraft stations, or between aircraft stations is consequently increasing;
c)   that the considered communication data links implement channel bandwidths from some kHz up to some hundreds of MHz requiring to study frequencies in the VHF range up to 23 GHz.
d)   that these new aeronautical communications are not related to safety of flights;
e)   that there is no clear identification of those bands in which these new aeronautical communication systems may be developed with a sufficient level of confidence for long term investment by industry;
f)   that the decisions of previous conferences have introduced some restrictions to the use and have imposed constraints on the development of these communication systems within several existing mobile allocations traditionally used by the aeronautical mobile applications;
g)   that the existing mobile allocations which can be used by these communication systems have some limitations due to coexistence with other services in the band;
h)   that in Region 1, there are allocations to the mobile except aeronautical mobile service in some frequency bands which are allocated to the mobile service in Regions 2 and 3;
i)   that harmonized worldwide allocation would facilitate the implementation of these new aeronautical communication systems ;
j)   the only frequency ranges beyond 400 MHz, worldwide identified for aeronautical mobile applications other than those with the mobile allocation, those en route (R) or for telemetry are beyond 55 GHz as per N° 5.558;
k)   that an adaptation of the regulatory framework for further visibility, protection and development of non-safety aeronautical mobile applications may be required;

   recognizing
d)   that new allocations for the aeronautical mobile service in the range 144-174 MHz would extend the existing usage in the band 138-144 MHz and would ensure the possibility to  develop systems operating on a wider tuning range providing that the protection of the incumbent services is ensured;

   noting
a)   that the band 144-146 MHz is allocated to the amateur and amateur-satellite on a primary basis in all Regions;

        resolves to invite ITU-R
1   to study spectrum needs for new non-safety aeronautical mobile applications for air to air, ground to air and air to ground communications of manned and unmanned aircraft systems;
2   to study the bands 162,0375-174 MHz, 862-874 MHz and 22-22.21 GHz already allocated on a primary basis to the mobile except aeronautical mobile service, in order to evaluate the possible revision or deletion of the “except aeronautical mobile” restriction;
3   to study possible new allocations to the aeronautical mobile service in the bands 144-146 MHz, 5000-5010 MHz and 15.4-15.7 GHz, while ensuring the continued operation and the protection of existing services in the considered bands and, as appropriate, adjacent bands, and not constraining future development of these services;
4   to review studies in resolve 1 to 3 and elaborate regulatory measures for the possible introduction of new non-safety aeronautical mobile applications;
5   to complete studies in time for WRC 23,
   further resolves to invite WRC-23
to review the results of these studies and take appropriate actions,
   invites administrations
to participate actively in the studies by submitting contributions to ITU-R.


10
Microwave / Odg: Novi Meteo radar u Medulinu
« Zadnji post 9A3LI 12. Srpanj. 2019, 11:54:22 »

Situacija sa sličnom siluetom.
Kad se objekti sa zaslona radara dovedu u realne okvire (mjere) brod dužine 4 km koji pređe put od 19 km u 10 minuta i na kraju nestane sa zaslona?
A ko zna kak taj radar generira sliku, sve je to neka obrada pa prikaz, nije klasični radarski prikaz "ping-pong", uglavnom ti "oblaci" se podudaraju sa pozicijom velikih brodova, uostalom nebitno.

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