The following series of images were captured/created when a milestone or new record was reached. There are more technical images and notes on the Modez wiki page. If you wish to see photos of the last major outdoor test, which involved five laptops, two USRPs and an SBS-1, please visit the album in my gallery.
The aviation tracking system ("Modez") and an SBS-1 (thanks to Matt Robert) with its Base Station software were run side-by-side to undertake a rough performance comparison. For various technical notes on the SBS-1, including sampling the baseband output with an LFRX daughterboard, please see the page on my wiki. If you're interested in the photos of the major outdoor test where the SBS-1 was pitted against Modez, visit the album on my gallery.
Winrad and its forks (HDSDR & WRplus) are software radio interfaces that run on Windows. They support a number of SDRs as input sources (known as ExtIO plugins). There was previously one for the USRP, however I decided to write a new one with UHD and legacy support, and much more (e.g. remote control and streaming over a LAN).
For the Mode S/aviation/RF enthusiast: If you are interested in various notes, diagrams and screenshots that are more technical than these series of pages, please check out the dedicated page on my wiki as well.
Modez, Aviation Mapper and Software Defined Radio featured in GQ Australia (April/May)!
Screenshots from the GUI front-ends:
A plane at 514 km, with trails left behind showing flight corridors
Looking at an angle at Sydney Airport, with planes landing on overlapping approach trails.
ACARS messages shown spatially as coloured dots with message label and content in balloon pop-up.
Spatial representation of ACARS message transactions building up over half a day
This experiment involved acquiring CellID and signal strength information from the GSM cellular network, tracking one's position while acquiring this data, and finally presenting it nicely. It is summarised in the following pictures (full details are described in the sub-sections found top-left):
This started with my desire to build a Woktenna.
Of course you can't very well put a PCMCIA wireless card at the focal point of a cooking wok!
So the alternative is using a USB WiFi adapter that can hang on the end of a USB extension cable and
introduce minimal analog signal loss and USB is digital!
Despite the fact is says "Linux compatible" on the box, it wasn't immediately possible to do what I wanted to do,
which is: monitor mode!
With monitor mode, I'd be able to point the woktenna around and pick up the beacon frames of distant APs.
I found two drivers available for this device:
one over at BerliOS,
and the other at SourceForge.