• SDR NEWS/PROJECTS 23 07

    From LU9DCE@21:5/101 to RTLSDR on Tue Jul 23 15:10:37 2019
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    ESTACION DE PACKET RADIO - BUENOS AIRES (GF05OM)
    BOLETINES INFORMATIVOS PROGRAMADOS (BIP)
    SLACKWARE LINUX - HELLOCODELINUX@GMAIL.COM

    +----------------------------------------------------------------------------+ Title : rtl-sdr.com

    Title : Atomic Radio: Quantum Laser Based Radio Reception

    Content : Software defined radio (SDR) is a relatively new
    technology that has impacted the world of radio technology in many
    ways. But beyond SDR, there are still some other very interesting
    radio technologies being worked on, such as "Atomic Radio" a.k.a
    "Quantum Radio".

    Title : Slow Scan Moon Bounce Event for 50th Anniversary of the
    Moon landing

    Content : Fifty years ago Neil Armstrong became the first man
    to step foot on the moon. This weekend on June 20th and 21st 2019
    Amateur Radio operators at the [ PI9CAM ] team have been transmitting
    Slow-Scan Television images in commemoration of this historic event
    at the Dwingeloo radio astronomy station in the Netherlands. This
    station is the oldest rotatable 25-meter radio telescope in the
    world. 

    Title : Weather Satellite Meteor M2-2 Now Transmitting Images

    Content : Reports from Reddit and Twitter are in that the recently
    launched Meteor M2-2 weather satellite is now functional and
    broadcasting images at 137.9 MHz. A few people have noted that the
    reception quality appears to be better than the older satellite.

    Title : PICTOR: An Open Source Low Cost Radio Telescope based
    on RTL-SDR

    Content : PICTOR is an open source and open hardware radio
    telescope that aims to promote radio astronomy on a budget. It
    consists of a 1.5 meter parabolic dish antenna, 1420 MHz feedhorn, a
    two stage low noise amplifier (LNA), high pass filter, and from what
    we gather, an RTL-SDR. Future designs may also use higher bandwidth
    SDRs. Currently there doesn't seem to be much information about the
    build and exact components used in their design, but we're hoping
    that those details will come in time.

    Title : A Low Cost 2.4 GHz Downconverter from off the Shelf Dev
    Boards

    Content : Over on GitHub Ian Wraith has released his design and microcontroller code for a low cost 2.4 GHz downconverter circuit
    . A downconverter is a hardware device that shifts the signals that
    it receives into a lower frequency band. This is useful in the case
    of RTL-SDRs and Airspy SDRs, as their maximum frequency range is
    only 1.7 GHz. Ian's 2.4 GHz downconverter reduces those 2.4 GHz
    signals down to 1 GHz, which can then be received with his Airspy.

    Title : SignalsEverywhere: Improving HF Reception with Impedance
    Matching

    Content : This week on the SignalsEverywhere YouTube channel
    host Corrosive explores why impedance matching matters when trying
    to obtain the best reception possible. To do this he reviews the
    NooElec 1:9 Balun, which is designed to convert the (roughly)
    450 Ohm impedance of a long wire antenna or ladder line dipole
    back down to 50 Ohms, which is the standard impedance that an SDR
    expects. Small amounts of impedance mismatch are negligible for RX,
    but larger mismatches can result in poor reception.

    Title : Investigating the Galileo Satellite Navigation System Outage
    with a LimeSDR

    Content : Galileo is a European Union owned satellite navigation
    system. Galileo was created so that the EU does not need to rely
    on the US GPS or the Russian GLONASS satellites, as there is no
    guarantee that these systems won't be purposely turned off or
    degraded by their governments at any time.

    Title : Upcoming KerberosSDR Software Updates: Automatically Estimate
    TX Location and Navigate There

    Content : KerberosSDR is our 4x Coherent RTL-SDR that we've
    developed together with Othernet. It can be used for tasks such as
    direction finding and passive radar. KerberosSDR was successfully
    crowdfunded over on Indiegogo, and the first batch has already
    been shipped. Currently we are taking  discounted pre-orders
    for a second production batch on Indiegogo . Please note that the
    discounted pricing will expire when we ship, which according to
    the manufacturing schedule should be next month, so please get in
    quick if you're interested!


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    Politician, n.:
    From the Greek "poly" ("many") and the French "tete" ("head" or
    "face," as in "tete-a-tete": head to head or face to face). Hence "polytetien", a person of two or more faces.
    -- Martin Pitt

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