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Travis Goodspeed has shared a project about his adventure in tracking low orbit satellites using a fairly complex setup. He is using a dish intended for connecting to one of the Inmarsat satellites while at sea on a maritime vessel, a EiBotBoard connected to a BeagleBone for motor control and a RTL-SDR for receiving radio signals from the dish.
His goal has been to track the whole sky, including moving targets and it looks like he has been pretty successful. “ At Black Hat DC in 2008, I watched Adam Laurie present a tool for mapping Ku-band satellite downlinks, which he has since rewritten as. His technique involves using an DVB-S card in a Linux computer as a receiver through a 90cm Ku-band dish with fixed elevation and a DiSEqC motor for azimuth motion. It was among the most inspirational talks I’d ever seen, and I had a blast recreating his setup and scanning the friendly skies. However, such a rig is limited to geostationary satellites in a small region of the sky; I wanted to see the whole sky, especially the moving targets.
In this article, I’ll demonstrate a method for modifying a naval telecommunications dish to track moving targets in the sky, such as those in Low Earth Orbit. My dish happily sits in Tennessee, while I direct it using my laptop or cellphone here in Europe. It can also run unattended, tracking moving targets and looking for downlink channels.” — via. DVB-T dongles based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples with up to 3MHz bandwith to the host. I am testing here a DVB-T USB dongle based on Elonics E4000 tuner chip covering around 60-1700MHz (same tuner chip as used in the famous Funcube dongle SDR).
For this quick test I am using only a temporary 45cm dish (old unused TV “Camping equipment” dish) and a wideband PCB based Log-Periodic Antenna as a dish-feed. I am loosing some signal due to the linear polarization (-3dB) of the feed whilst the sat is transmitting circular polarization and some losses due to a couple of adapters between Antenna and DVB-T stick. SNR on FFT is around 15-16dB for Inmarsat with this tiny antenna.which I find quite impressive. You really g –.
Getting started with SDR# and an RTL SDR tuner. Started receiving signals using an RTL-SDR TV tuner dongle together with the SDR# software. Once you have a compatible TV tuner (such as the. The RTL-SDR is an ultra cheap software defined radio based on DVB-T TV tuners with RTL2832U chips. The RTL-SDR can be used as a wide band radio scanner. It may interest ham radio enthusiasts, hardware hackers, tinkerers and anyone interested in RF.
SDR has become ever easier thank to the many tuners that have come on the market. A USB dongle stick that can pick up a range of frequencies combined with the right software can display a multitude of wireless transmissions. Everything from train communications to real time plane schedules can be listened in on and watched.
Takes the old Ham Radio hobbyist to a new level of wireless frequencies and communications. Software Defined Radio USB Tuner Dongle Sticks RTL-SDR Blog is a known and trusted name in the SDR community. Product Features R820T2 tuner Frequency capability 24 MHz to 1.7 GHz This SDR stick it can pick up frequencies from 24MHz-1750MHz, which will allow to listen in on CB radio, FM broadcasts, Fire, Police, or even planes going overhead. No software is included but most SDR software is free to download on the internet. Product Features RTL2832U interface IC R820T2 tuner Frequency capability 24MHz-1750MHz Telescopic antenna included This is a custom modified DVB-T USB dongle tuned for SDR usage.
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It can work with most SDR software such as MATLAB HDSDR, SDR Touch, SDR#, Planeplotter and so on. Product Features E4000 tuner Frequency capability 55MHz- 2300MHz Includes a telescopic metal antenna and a remote control This is a great starter SDR tuner dongle at a great price.
Product Features RTL2832U and R820T tuner MCX input Frequency capability 25MHz-1700MHz.