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What might look like an abstract artwork is actually a novel antenna, small enough for a minisatellite, to track global ship traffic from orbit.
Commercial vessels are mandated to transmit Automatic Identification System (AIS) signals, which are used to track maritime traffic – the oceangoing equivalent of air traffic control. The system relies on VHF radio signals with a horizontal range of just 40 nautical miles (74 km), useful within coastal zones and on a ship-to-ship basis, but leaving open ocean traffic largely uncovered.
However, in 2010 ESA fitted an experimental antenna to Europe’s Columbus module of the International Space Station, demonstrating for the first time that AIS signals could also be detected from up in orbit, opening up the prospect of global ship tracking from space.
“Based on our testing, this new prototype designs offers a four-fold increase in ship detection performance,” explains ESA antenna specialist Nelson Fonseca, overseeing the project.
“The AIS detection system on Columbus employs a low-gain ‘whip’ antenna, receiving signals within a very broad beam, with corresponding potential for signal overlap and interference.
“This antenna design combines higher-gain with a more reduced footprint, allowing more of a focus on regions of highest interest, and can also discriminate between polarisations, increasing the likelihood of detection for any individual AIS signal within the antenna field of view.”
In addition, clever engineering has shrunk the overall antenna size to a size where up to five could be hosted on a single cubic-metre minisatellite.
“Despite its name, VHF is quite a low wavelength in space terms, implying a bulky antenna of about 1 m across and half-a-metre thick to operate ideally at that frequency,” Nelson adds.
“But the patterned square-shaped structure on the underlying face of our antenna changes the signal behaviour, enabling us to shrink the design to 50 cm width and 3 cm thickness – making it suitable for hosting on a smaller platform.”
The antenna was developed through ESA’s ARTES Advanced Research in Telecommunications Systems – Advanced Technology programme with Italian companies CGS as prime contractor and MVG as subcontractor in charge of the electrical design.
“CGS and MVG are highly interested in moving forward with the optimisation and environmental qualification of this outstanding antenna element,” explains Andrea Di Cintio, managing the project at CGS. “The next step will be to identify a specific mission and then optimise the design and qualification accordingly.”
“Significant reduction of antenna dimensions and weight without compromising electrical performance was challenging,” adds Andrea Giacomini, lead antenna designer at MVG. “It required a radical change in the design and validation approach. We are proud to have been involved.”
Credit: ESA–G. Porter, CC BY-SA 3.0 IGO
Compact is a neat little studs up font. Basic, but gets the job done. Perfect for signing mosaics.
Try writing with the font or check the details on Swooshable.
Car: BMW 316i Compact.
Year of manufacture: 1999.
Date of first registration in the UK: 20th May 1999.
Place of registration: Chelmsford.
Date of last MOT: 7th April 2021.
Mileage at last MOT: 100,621.
Last change of keeper: 9th August 2020
Date taken: 3rd June 2021.
Album: Carspotting 2021
A very basic Compact. Top spotting points if you see one of these now.
Plate comes back to a Piaggio T5 (a scooter?)
My first pass at the building was only three stories, then I added an additional three. If I had to fit the building in a more compact space or if looked out of place in a layout, I could go back to three.
This 1 3/8 inch figure is the DC Comics character The Flash as seen in the game HeroClix. The red and yellow streaks behind him are actually tissue paper.
I believe this is the first toy photo I've posted to Flickr that was lit by my camera's flash. I typically use lamps, flashlights, LEDs, etc.
This image is straight out of the camera: no tweaking, no color processing, no cropping, no nothing.
Submitted to the Flickr group 7 Days of Shooting.
I will be using this camera in week 325 of my 52 film cameras in 52 weeks project:
www.flickr.com/photos/tony_kemplen/collections/72157623113584240
The TR9000 series is the latest in tracked surface rovers from Sirius Cyberdine Industries, your galactic leader in planetary transport. The TR9000 features an all new compact communications uplink array, as well as several open sub-system fittings for a host of equipment sensors, defense arrays, and life support. With an open interior plan, the TR9000 series is highly customizable for whatever your surface needs call for. It can be outfitted with life support systems for most know sentient species and still have room for long-term survival. The extra-large composite windscreen permits easy viewing in most conditions while still preventing the harshest of cosmic rays from penetrating to the interior. See your local Sirius Cyberdine dealer for more information or to order your single model or fleet today!!
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As hinted, here's a second Febrovery entry from me, to you my loyal followers. This uses that new Star Wars trans-yellow windscreen and some castle walls for the exterior. As this is just a dealer demo model, I've left the interior bare so the potential buyer can visualize whatever they might need to equip it with. I hope you all like this one, its my last entry for the great month of Febrovery. I'll be moving over to the LSB speeder bike contest next. After that who knows. Life issues still need dealing with but I hope you guys will still stick by me, I promise there will be more builds, just can't say when. Cheers!
-Tim
1998 BMW 316i Compact.
Previously registered G2 OTL.
Subsequently re-registered S255 SBJ in June 2025.
Last (extended) MoT test expired in November 2020 (SORN).
No previous keepers.
The Foxtrot fighter is a modified GARC viper. She's equipped with 2 short-range ballistic guns and 4 low-frequency phase cannons for shield dampening. Though she's low on firepower, she makes up for it with sheer speed. All this coupled with the ability to compact into a small cargo bay makes her a bounty hunter's best friend.
This has got to be my absolute favorite out of all the fighters I have built for the 14x14x6 starfighter challenge because it's just so fun to convert, and it's pretty dang swooshable too.
I initially wanted to have a few small cars that would fit into an autorack, similar to the Vert-A-Pac. The train car didn't work out, but the regular cars did. I will now use them for my LUG's city layout.
Rosenbauer Compact Line, MAN TGL, YN16 DJK, Seen at the Rosebauer Fan Day on the 25th of January 2017
Digital image captured with an Olympus XZ-1 compact camera
Editing done via Photoshop Elements 12 with Topaz Labs plug ins
Found and admired during the 2017 KSHE Classic Car Show in Chesterfield, Missouri, USA
The MRK III Compact was
an attempt by manufacturers Slayn & Korpil to build on the success of the earlier MRK I (and to a lesser extend the MRK II), retaining the heavy armament of the original while improving manoeuvrability and reducing maintenance.
The ship retained the originals ion and laser canons and featured a gunner turret capable of 360 degree rotation. As a compromise it required 2 crew; a pilot and a gunner.
Technological advances allowed the size of the s-foils to be significantly reduced, and the engine cluster to be minimised and positioned behind the crew pods.
More pictures on Instagram
From where I sit at this moment, Orkney seems so remote. It's easy to forget that it sits just off John o' Groats and was a bit of Scotland nibbled away and submerged at the end of the Last Glacial Period. Prior to that, the lowered sea levels left Doggerland high and dry — a convenient stepping stone for humans to repopulate Britain from the rest of Europe. Yes, I've been to the very north of the archipelago, to North Ronaldsay. Today I'm away to South Ronaldsay — ironically juxtaposed at opposite ends from its northern namesake. This won't take me to Orkney's most southerly isle, Stroma, which to be honest has less water between it and Scotland that it has between itself and the rest of Orkney.
Here's a reminder of how compact these islands are. This is the northern tip of Glimps Holm looking back across Lamb Holm to Mainland. By now I've crossed two of the causeways constructed as navigation barriers in WWII. There are what appears to be military installations, there on the cliffs of Lamb Holm. In the middleground lie relics of the block ships sunk here early in WWI. I think this was the SS Numidian, an almost 5000 ton steel hulled steamer scuttled here on 30 December 1914. She was sunk in the company of SS Aorangi, SS Thames and SS Minieh with, I think, Numidian in the shallow water near this spot. I could be wrong. If you need a better answer there's a kind of trainspotters' guide to the wrecks of Scapa Flow.
Orkney is so user-friendly. It's a small place, compact, packed to the gunwales with history; so much that with sea level rise its, Plimsoll line is in peril of disappearing beneath the waves. Getting about is quick and easy; all that and it has a village named Twatt.
If there’s one company in Australia with heaps of dino compactors, that company will be Suez, or SITA as I wish they were still known. Maybe in the past the company had more dino work on a national scale, but the high majority is now subject to their Sydney operations, with most of their bulk bin trucks indeed dino roll-offs. I’m sure the company has a good couple hundred open top containers, compactor containers and integrated units in Sydney, a lot of which appear to be young or freshened up. However, a few years ago I came across one of their older pieces of equipment outside their Wetherill Park transfer station, just sitting on the road unattended while its transporter was somewhere else. I love seeing a compactor just sitting on the road out from a dock, especially at night in the Sydney CBD haha It’s not often you would find a compactor of this capacity being used for garbage, so I think it’s safe to say this is a dry waste container or more likely one for paper and cardboard. You can tell this one is an oldie, with very faded paint and signage, plenty of scratches and a decent amount of rust. You can see the front of the container has been punched inwards... a result of the many times this steel box has been pushed into its resting position by the bail hook and frame. I reckon the “No Parking Day Or Night” signs should feature an additional “Offending Vehicles Will Be Towed” - not hard to do with the truck!
Destijds compact camera en niet in RAW (terwijl hij dat wel kan). Kwaliteit matig. Later DSRL gekocht en nog wat later ook RAW.
Second generation of the Tercel, Toyota's sub-compact car that introduced the brand to thousands of buyers who remained loyal for decades, thanks to the car's reliability.
This Tercel, in great shape for its age, was spotted along several other cars from the 1980s which will be used for filming (you can see the filming crew and equipment on the steps in the upper section of the picture).
A V-22 Osprey unfolds it's rotors as the crew preps the aircraft for departure from the California International Air Show.
I normally don’t fall in love with AF zoom compacts, but I did with this little Konica Lexio 70 W! It is incredibly small and (to my eyes) a very handsome camera. I can’t call it a plastic wonder as it is made out of metal. It feels like an expensive camera, the Yashica T4 feels positively 3rd rate compared to the solid and chic Konica.
Specs wise, it manages to pack a 28-70 zoom with a very respectable aperture of 3.4 at the 28 mm setting. This is a bit Pentax Espio 928, but in a body of an Espio Mini. The large LCD is backlit in indigo blue, very nice touch. The camera has all the usual modes including a backlight compensation of 1.5 EV. There is no dedicated button to cancel flash, but there is a curious feature. If you select to cancel the flash and turn the camera off, next time you turn it on, just press the mode button once and the camera reverts to your previous setting, very cool!
This is the very first time with an AF zoom compact camera that I can’t complain about the viewfinder. For the first time I have a compact zoom camera with a big viewfinder, in fact so big that I can compose with my eye at 15/20 mm from it, remarkable. Konica has profited from this big viewfinder and incorporated not LEDs but icons at the bottom of the frame like macro, AF confirmation, flash and infinity focus. Also, the viewfinder is very bright and has a dioptric correction.
I suppose there must be a catch, but I have failed to find it just by playing with the camera. Possibly the week point of the camera is in the lens. I have to try it and confirm my suspicion, if the lens performs decently, then this Konica Lexio 70 W will be the first zoom P&S camera that I will use with pleasure.