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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
New constructions for the wall - Compact St Jude's Dungeness - Wood, nails, 13 years of gloss paint, lichen, stabilizer and varnish
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.
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
I couldn’t resist putting both of my US trucks together for a photo. After playing around with them after the last post, both received some modifications, the largest of which is a rework of Pete's headlights. The old ones were set too high, which created a weird appearance from certain angles. I managed to make new headlights lower and more compact - now I am completely happy with the results.
A very basic Compact. Top spotting points if you see one of these now.
Plate comes back to a Piaggio T5 (a scooter?)
After P7 speeder did not perform as well as expected in the Unlim class, team AstroTech turned their eyes to the B+ class of the Galactic Speeder League with their new P8 racing speeder. Being as nimble as the team's previous project, it's currently the most compact speeder in class. With a large protonic engine and sleek aerodynamics it is expected to be almost unbeatable at twisty tracks with smooth surface like those on planet Exo or Mauna-Effa.
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.
The best words to describe HK's cityscape.
Recently fall in love with the skyscrapers and cityscape, I spent few weekends on wandering around Central to Wan Chai. Look up and look for sth fun!! :)
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
Das soll der Neue haben
Der Ignis Vorgänger stand noch auf kleinen R14 Felgen und wirkte deshalb viel kleiner, jedoch ist der Anzug am Ampel-Start besser!
Breitreifen bringen mehr Komfort und decken kleine Straßen Löcher besser ab.
Diese sind aber laut!
18 cm Bodenfreiheit sieht man!
175/65R15 (clear) (B / C / 66)
175/60R16 (shine, flash) (B / B / 69)
trim levels:
clear = Basic
shine = comfort
flash = comfort+ (plus means exclusive)
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.
One of my favourite reserves in the whole North of England due to it's open plan nature. There are many lakes, ponds, reedbeds and meadows. There are lots of nature trails and as you walk around you can see the wildlife and observe it from the paths.
www.rspb.org.uk/reserves/guide/s/staidans/
St Aidan's is a perfect place to get close to nature and relax, unwind or exercise in a stress-free environment. Just outside Leeds on the banks of the River Aire, it's a big new space to walk, run, cycle, or ride your horse and enjoy the wildlife that surrounds you.
It has a wide range of wild plants and animals, and is home to thousands of birds, brown hares, roe deer, wild flowers and insects - all living in a stunning landscape of vast reedbeds, grassland, woodland, lakes, ponds and islands.
With a variety of circular paths of varying lengths and large areas of open grassland, St Aidan’s is a great place for families to enjoy the outdoors, share a picnic and play together.
Over 7.5 miles (12 km) of footpaths, bridleways and cycle routes connect the surrounding communities, with links to national footpath and cycle networks. St Aidan's is a fantastic place for locals wishing to explore the wider countryside or as a destination for people who love nature.
Opening times
St Aidan's is an open access site. Opening times apply to the visitor centre and car park. From March-October they're open from 9.30 am to 5 pm. From September-February it's 9.30 am to 4 pm. They're closed on Christmas Day and Boxing Day.
Entrance charges
Entry to the site is free but donations to help us continue our work are welcome. There is a car park charge of £2.50 per car for RSPB non-members. RSPB members and disabled badge holders park for free.
Information for dog owners
Dogs are allowed on the reserve as long as they are kept on a lead in the appropriate designated zones. There are some less sensitive areas within St Aidan's where dogs are allowed off the lead. Please check with staff before letting dogs off the lead.
Star species
Our star species are some of the most interesting birds you may see on your visit to the reserve.
Bittern
Bitterns are brown, secretive herons, camouflaged to hide amongst reeds. Visit in spring to hear male bitterns 'booming' or summer to watch the parents making feeding flights.
Great crested grebe
Watch the amazing courtship ritual of great crested grebes on the open water in spring. You may see pairs performing their 'weed dance' when they present one another with weed and patter across the surface of the water together.
Little owl
You may be lucky enough to find one of these compact owls perched in a tree or on a fencepost. They become very active at dusk and you may hear their shrill calls.
Marsh harrier
Look for marsh harriers gliding over the reedbed with their wings held upwards in a shallow 'v'. In spring, pairs perform their breathtaking 'skydancing' displays high in the sky.
Skylark
Spring visits will be enriched by the beautiful song of skylarks. They rise up into the air from the grassland until they are barely visible and only their song can be heard
www.rspb.org.uk/reserves/guide/s/staidans/seasonal_highli...
Seasonal highlights
Each season brings a different experience at our nature reserves. In spring, the air is filled with birdsong as they compete to establish territories and attract a mate. In summer, look out for young birds making their first venture into the outside world. Autumn brings large movements of migrating birds - some heading south to a warmer climate, others seeking refuge in the UK from the cold Arctic winter. In winter, look out for large flocks of birds gathering to feed, or flying at dusk to form large roosts to keep warm.
Spring
Look out for marsh harriers displaying over the reedbeds, great crested grebes performing their elaborate courtship dances and returning swallows skimming low over the water and grasslands as they collect insects. Listen out for skylarks filling the air with their song, the deep booming of male bitterns, male snipe 'drumming' as they vibrate their tail feathers to attract females and lapwings calling as they perform their aerobatic displays. Enjoy the fusion of colour as wildflowers burst into bloom and a host of brightly-coloured butterflies and dragonflies take to the wing. Spring is also a great time to see kestrels. You can often see several hovering around the site at the same time as they hunt for voles in the grassland. Kestrels have also been seen nesting in the huge dragline.
Summer
Watch overhead for herons and little egrets dropping into the reeds to feed, female bitterns flying low over the reedbeds as they seek out food for their chicks or marsh harriers passing food to each other in flight. Keep an eye on the open water for lines of young ducklings paddling along behind their parents or young great crested grebes riding around on their parents' backs and admire the abundant lilypads on the lakes. Stoats, weasels and water voles are often seen at this time of year as are basking butterflies and dragonflies hawking the waters edge. Thousands of black-headed gulls set up a colony at this time of the year filling the air with their calls. Summer is the best time to spot the elusive black necked grebe as it will have its fluffy youngsters in tow. Avocets also nest at this time of year. St Aidan’s is a good place to spot this iconic bird that is the logo of the RSPB.
Autumn
Autumn sees the arrival of migrant birds, such as black-tailed godwits, ruffs and green sandpipers. Local birdwatchers will also spot a few rarities such as spoonbills and pectoral sandpipers. Huge flocks of lapwings arrive to spend winter with us and can be seen around pool edges and on grassland. Short-eared owls hunt over the reedbeds and our winter wildfowl begin to arrive. Look out for flashes of blue as kingfishers flit up and down the river.
Winter
Waders and wildfowl such as lapwings, curlews, wigeons, teals, shovelers and goldeneyes gather in big numbers, roosting and feeding across the grasslands and pools. Water rails can be spotted feeding on frozen pools, or you can listen out for their strange, pig-like squealing! The elusive bittern is also drawn out into the open at times. One of the most awesome spectacles in winter is seeing massive flocks of roosting birds panic and fly into the air as peregrines hunt over the site. Look and listen out for overwintering stonechats. Their calls sound like two pebbles being knocked together!
Facilities
Facilities
•Visitor centre
•Car park : There's a car park charge of £2.50 per car for RSPB non-members. RSPB members and disabled badge holders park for free. We have cycle parking and a height restriction of 2.7 m (8' 10'') for vehicles.
•Toilets
•Disabled toilets
•Baby-changing facilities
•Picnic area
•Group bookings accepted
•Guided walks available
•Good for walking
•Pushchair friendly
Nature trails
Bowers Bimble: Starting from the car park, this 0.9-mile (1.5 km) flat trail takes you on a short walk around Bowers Lake then through grassland and wild flower meadows. Great for a relaxing stroll (20-30 minutes).
Lowther Loop: For a walk through shady woodland glades and along the banks of the River Aire, venture onto this 1.3 mile (2 km) flat trail. In wet winter months, it’s a welly boot walk (60 minutes).
Hillside Hike: For stunning landscapes and panoramic views of the nature park and surrounding areas, t ake a hike onto the hillside. This trail is 1.3 miles (2 km) with some steep hills and inclines, which wind through the trees and grassland (40-60 minutes).
Reedbed Ramble: To explore the magic of the whispering reedbeds, take a walk on this 1.7-mile (2.8 km) flat route that runs around the edges of the reedbeds and loops back to the main entrance (40-45 minutes).
As the new custodians of St Aidan's, we are aiming to improve the accessibility of our paths as soon as we can. Please contact us for updates on footpath and bridleway conditions.
Refreshments available
•Hot drinks
•Cold drinks
•Snacks
•Confectionery
By train
The nearest train stations are Woodlesford (3.2 miles), Castleford (3.2 miles) and Garforth (4.3 miles). If you're going to be walking or cycling from the station to St Aidan's, choose Woodlesford station. Turn left out of the station then left onto the main road. When you get to the bridge over the Aire and Calder navigation, cross it, then turn right and walk along the riverbank until you reach St Aidan's. If you're going to take a taxi from the station to St Aidan's, head towards Castleford station as it's easier to get a taxi there.
By bus
The nearest bus stop is just outside the entrance to St Aidan’s, on Astley Lane. The Number 167 Leeds to Castleford bus stops here and is run by Arriva Yorkshire.
By road
Reach us from junction 46 of the M1. Follow the A63, signposted Selby and Garforth. At the roundabout, take the fourth left for Wakefield A642, Swillington and Oulton. Follow the A642 for 1.5 miles then turn left on to Astley Lane. St Aidan's is 1.8 miles on the right.
From Castleford, follow the A656 (Barnsdale Road) north out of the town centre for 1.4 miles. Turn left onto Station Road towards Allerton Bywater and travel 1.2 miles. Turn left onto the Leeds Road (next to the yellow corner shop). St Aidan’s is 0.5 miles along the road on the left.
Other ways to get to the reserve
It's easy to get to St Aidan's by bike. The site is bordered on its south-east edge by the Trans-Pennine Trail central section (Route 67). This runs north all the way to Leeds city centre, and south to join the main east-west route near our Old Moor nature reserve at Barnsley. There is also a local cycle route called the Linesway Greenway (Route 697) that runs between Garforth and Allerton Bywater with a spur at the Allerton Bywater end that links into the site. St Aidan's is also bordered by the Leeds Country Way. Maps of this route can be found on the Leeds City Council website. There are also many other local footpaths and bridleways that link into the site from the surrounding towns and villages.
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.
For when I'm not able to bring along the DSLR. Those vintage good looks made hard to resist taking a shot.
Fujica Compact 35
camera-wiki.org/wiki/Fujica_Compact_35
Fujica Light Compact 35 S
www.asahi-net.or.jp/~RD2H-ARI/FU_LIGHT_COM35S.htm(in Japanese)
camera-wiki.org/wiki/Fujica_Compact_S
Fujica Compact Deluxe
casualphotophile.com/2020/01/22/fujica-compact-deluxe-rev...
実はこのFuica Compact 35に興味を持ったのはここFlickrで検索して出てきたこのカメラでの作例フォトの素晴らしさを知ったことから始まりました。しかしながらこのCompact 35には幾つかのヴァージョンがあって、その中からレンジファイダー付きのCompact Sに興味が向き、既にフィルムによる写真をアップしてあります。このSの搭載レンズは38mm f2.5であって、こういう2.5という半端な数値のレンズに思いっきり惹かれた私であります。さてこのFujica Compactの最終兵器はFujinon 45mm f1.8付きのCompact D。コレには痺れますね！今現在手元にあるSとDは供にシャッターがちゃんと切れる完動品なので改造はまだしていません。今回、改造したのはオリジナルのCompact35。Fujinon 38mm f2,8付きのものです。このレンズは4群5枚とのこと…。しかしレンズ構成はクセノタール型ではなくテッサー型の一番全面に1枚メニスカスを置いた構成になっているようです。
Actually, my interest in the Fujica Compact 35 began when I discovered some stunning sample photos taken with this camera here on Flickr. However, there are several versions of the Compact 35, and among them, I became interested in the Compact S, which features a rangefinder. I’ve already uploaded some film photos taken with it.
The lens on the S is a 38mm f/2.5, and I was strongly drawn to that rather unusual f/2.5 aperture. Now, the ultimate version in the Fujica Compact series is the Compact D, equipped with a Fujinon 45mm f/1.8 lens — truly irresistible!
At the moment, both my S and D are fully functional with shutters working properly, so I haven’t modified them yet. The one I modified this time is the original Compact 35, which comes with a Fujinon 38mm f/2.8 lens. I’ve heard this lens has 4 groups and 5 elements, though its optical design seems to be not a Xenotar type, but rather a Tessar type with a single meniscus element placed at the very front.
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!
Instructions for my custom models for the Death Star Escape & Compactor are now ready. You can buy downloads on my website
RD18884. A train on the Wengenalpbahn (WAB), an 800mm gauge rack & pinion railway, arriving at Grindelwald.
On the right is a train on the metre gauge partial rack & pinion Berner Oberland Bahn (BOB) waiting to return back down to Interlaken Ost.
Thursday, 13th September, 2018. Copyright © Ron Fisher.
Cooks Beach
Gualala, Mendocino County, California
My dog Blue, the 83 lb. white Goberian.
camera: Olympus Stylus 100 WIDE
camera: Olympus mju-III WIDE 100
lens: 28-100mm F/4.6-11.9
film: Kodak Ultramax 400 (GC400)
filter: none
strobe: built-in an on for fill
support: hand held
develop & scan: NCPS
software: ACDSee Ultimate 10 (64 bit)
©2018 Chris Grossman, all rights reserved
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).