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LU9DCE > RTLSDR 20.07.19 14:02z 109 Lines 5011 Bytes #999 (0) @ WW
BID : 28780_LU9DCE
Read: GUEST
Subj: SDR NEWS/PROJECTS 20 07
Path: HB9ON<IW2OHX<IR2UBX<DB0RES<DB0OVN<DB0GOS<ON0AR<VE2PKT<N3HYM<LU9DCE
Sent: 190720/1401Z 28780@LU9DCE.TOR.BA.ARG.SOAM LinBPQ6.0.18
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ESTACION DE PACKET RADIO - BUENOS AIRES (GF05OM)
BOLETINES INFORMATIVOS PROGRAMADOS (BIP)
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Title : rtl-sdr.com
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!
Title : Signals and Bits A New SDR Podcast by the President of the
GNU Radio Project
Content : [ Ben Hilburn ] the president of the [ GNU Radio Project ]
has recently started a new podcast called [ Signals and Bits ]. If
you were unaware, GNU Radio is the defacto open source framework for
implementing digital signal processing code. Without it, many SDR
programs that we take for granted may have never been developed
as it is responsible for a lot of community DSP knowledge and
algorithm development.
Title : Artemis 3 Released: Offline Signal Identification Database
Content : The Signal ID Wiki (sigidwiki) is our sister site
that we started a few years ago as a way to collect and catalog
various types of signals that an SDR user might see and hear on
the airwaves. The idea is that a user could search the database to
learn about and identify unknown signals. Over time it has grown
significantly, with now almost 400 known signals with both waterfall
images and sound samples available in the database. Special thanks
to lead admin Carl Colena for maintaining and playing a huge role
in the databases' growth.
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Our policy is, when in doubt, do the right thing.
-- Roy L. Ash, ex-president Litton Industries
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