[time-nuts] How hard is it to detect a GPS Jammer?

Collins, Graham CollinG at navcanada.ca
Mon Oct 7 10:46:52 EDT 2013


Indeed, the inexpensive DVB-T dongles are showing up in many places including as David noted, decoding GPS.

For some details:

This gets you to the start of their web site:

http://gnss-sdr.org/

This is an interesting document they have published on their project:

http://www.cttc.es/wp-content/uploads/2013/09/Turning_TV_into_GNSS_Rx1.pdf


The AMSAT Fun Cube Dongle is a very capable and interesting device. Interestingly it uses the same Elonics E4000 front end chip that many of the inexpensive DVB-T devices do. Apparently Elonics is no longer in business and the inexpensive DVB-T devices using this chip are becoming less common. The DVB-T devises using the R820T chip are becoming the preferable versions when those with the E4000 cannot be found. I wonder if the Fun Cube Dongle will be likewise changed (perhaps it already has).


Cheers, Graham ve3gtc



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of David J Taylor
Sent: October-07-13 10:21 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] How hard is it to detect a GPS Jammer?

Many "scanners" now go to that frequency e.g AOR AR-8600. (100kHz to 2GHz ) They are hardly state-of-the-art receivers but should be capable of detecting jammers driving past. However a new unit is quite pricey $1000 equivalent in the UK as little as $300 for a used version. Also the AMSAT FCD Pro+ USB SDR at $200 and free software.

Alan
G3NYK
=========================

Or even the DVB-T dongles at just a few pounds (and with a wider bandwidth), covers up to around 1.7 GHz, I have red.  For example:

UK & Europe:
  https://www.cosycave.co.uk/product.php?id_product=288

US:
  http://www.nooelec.com/store/software-defined-radio/sdr-receivers/tv28tv2.html#.UlLDKRBE0a4

Admittedly, you aren't supporting AMSAT compared to the FUNcube Pro+, but for a quick experiment....

73,
David GM8ARV
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk 

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