1η Ημερίδα Ψηφιακών Επικοινωνιών DMR (φωτογραφίες)

Ο Πρόεδρος της RSF Hellas, SV1GFH

Ο Δημήτρης SV1EDZ και ο Νίκος παρουσιάζουν τον προγραμματισμό του HYTERA

Ο Γιάννης SV1EEZ στην παρουσίαση του Freebytes

Δυο αναλογικές αλεπούδες στο ψηφιακό παζάρι: SV1TN & SV1MO

1η Ημερίδα Ψηφιακών Επικοινωνιών DMR

Με μεγάλη συμμετοχή διεξήχθη η ημερίδα του Συλλόγου RSF Hellas για τις ψηφιακές επικοινωνίες VHF-UHF Digital Voice, με έμφαση στο DMR. Η διοργάνωση ήταν άψογη και αξίζουν συγχαρητήρια στον Δημήτρη SV1EDZ, τον Ανδρέα-Νικόλαο SV1GFH και τους λοιπούς συντελεστές. Η εκδήλωση υποστηρήχθηκε από τέσσερες αντιπροσωπείες πομποδεκτών (Helecom, Cobra, Freebytes, Δρυς) οι οποιοι παρουσίασαν σχετικά προϊόντα σε περίπτερα. 

Είχα την χαρά να συναντήσω αρκετούς συναδέλφους (SV1VN, SV1MO, SV1RD, SV1TN, SV1ZJ, SV1EML κ.α.).

Ιδιαίτερα αξιόλογη ήταν η παρουσίαση του τρέχοντος ελληνικού δικτύου επαναληπτών UHF DMR (SW1F, SW1G, SV4O, SV6G), της διασύνδεσης μέσω του BrandMeister, και της διαδικασίας προγραμματισμού των πομποδεκτών HYTERA για ραδιοερασιτεχνική χρήση. 

Δυο ακόμα αναμεταδότες παραδόθηκαν προς εγκατάσταση στον Χορτιάτη και στην Ιεράπετρα.

Κλείνοντας ο SV1EDZ ευχαρίστησε τον SV1RD για την συνεχή ενημέρωση μας σε θέματα ψηφιακών επικοινωνιών μέσω του γνωστού site DigitalMode. και υποσχέθηκε ότι θα ακολουθήσουν και άλλες ημερίδες με ανάλογα θέματα.

 

Thessaloniki NDB

Most radio hobbyists ignore that a Non-Directional Beacon (NDB) operates near former Alatini works in Thessaloniki. Its Morse code id is THS and it transmits continuously on 345 kHz.

Last week I visited the site of the beacon and shot a few photos.

Panoramic view from the North	No tresspassing sign
The eastern mast	Transmitter shed
Detail of insulators and pulleys	View from the East

This nice NDB has been in operation for decades. Although it is located on the approach to RWY 16 of Makedonia Airport (LGTS), nowdays is not used much by aviators. 

It is easily accessible from public spaces and roads, just south of Thessaloniki Music Hall, at 40.593600 N - 22.948100 E, so if you are in the area you may visit the site. 

CNSP30 balloon over Greece

Plot of CNSP30 balloon from HABhub

Today we had a daytime pass of CNSP30 balloon over Greece. Most previous passes took place during nightime so we missed the change to plot it. In the morning it appeared that the balloon would follow a southest course and pass over Attica, unfortunately it turned East and was better received in Larissa and Thessaloniki. The balloon transmits APRS packets using callsign K6RPT-11, which are gated to the APRS.IS network and then plotted at the HABhub tracker site. 

During the pass I run an APRS receive only setup and I enabled my connection to the APRS internet servers network with a filter to pass only K6RPT packets. Some of the packets uploaded were from my station, either received directly or over an APRS digipeater.

NASA releases research papers to the public

NASA published the following announcement, effectivley giving free public access to NASA research papers: 

NASA PubSpace NASA is using PMC to permanently preserve and provide easy public access to the peer-reviewed papers resulting from NASA-funded research. Beginning with research funded in 2016, all NASA-funded authors and co-authors (both civil servant and non-civil servant) will be required to deposit copies of their peer-reviewed scientific publications and associated data into NASA’s publication repository called NASA PubSpace. This exlcudes patents, publications that contain material governed by personal privacy, export control, proprietary restrictions, or national security law or regulations. NASA PubSpace is part of PubMed Central (PMC) which is managed by the NIH. You can now search NASA related articles archived in PMC at NASA PubSpace. PubSpace will be fully functional Fall of 2016.

Already over 800 recent research articles, published within 2016, have been uploaded in PDF format to the site, which uses the infrastructure of the US National Library of Medicine, National Institutes of Health.