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Steamrails K183 steams towards Geelong while undergoing tests prior to its re-entry into service. 13/11/21
Testing one, two and now, three.
Radio frequency testing has begun on the first Orion spacecraft that will fly around the Moon for the Artemis 1 mission, just two weeks after thermal and environmental tests were completed at NASA’s Plum Brook Station in Ohio, USA.
Electromagnetic compatibility or EMC testing is routine for spacecraft. All electronics emit some form of electromagnetic waves that can cause interference with other devices. Think of the buzz that speakers give out right before an incoming call on a mobile phone.
Spacecraft electronics can cause similar interference, but out in space such interference can have disastrous consequences, so all systems must be checked before launch.
EMC tests often take place in a special shielded room constructed of metal walls and doors and foamy spikes (aka Absorbers) that block out unwanted external electromagnetic radiation, like ESA’s Maxwell chamber at its technical site in the Netherlands.
Though not an EMC chamber, Plum Brook’s thermal vacuum chamber is made of aluminium that does provide electromagnetic shielding, making it a suitable substitute.
To test electronics, the spacecraft will simulate a flight in realistic conditions with most of its subsystems and equipment powered and in operational mode.
The electronics are first tested for compatibility in this electromagnetic shielded chamber. Equipment will be switched on to test whether they do potentially disturb one another.
In the second round of tests, electromagnetic fields will be applied using antennas around the spacecraft to test the susceptibility to interference from external sources. The Orion capsule is equipped with electromagnetic field sensors to take measurements as the disturbance frequencies are injected into the chamber.
While all subsystems are a potential source of radio frequency noise, of particular interest are the transmitters that intentionally generate radio frequencies. These can easily disturb other equipment sensitive to electromagnetic noise, like GPS receivers, tele-command modules and other communication elements.
Orion’s European Service Module provides power, propulsion, and crew life support.
ESA experts are on site monitoring all tests alongside NASA colleagues as Orion moves closer to its first flight without a crewaround the Moon.
Find more in depth coverage of all things Orion on the blog.
Credits: ESA
A check of RTT last Tuesday alerted me to the running of the monthly 1Q47 Derby R.T.C. - Carlisle High Wapping Sidings PLPR train that evening.
A further check of a TOPS list showed that the recently refurbished 37521 was one of the two loco's in the frame for this caper so I headed out.
A phone convo' with Dave McDigital was had, I collected him in the car and together we sallied forth to Nethertown.
Sadly 521 was not leading but one can't really complain about a 37/4 in this day and age, 421 fronting up.
A test shot of the Brenzier Method outside of my office building. I used a 50mm 1.4 at 1.4. There are 24 shots here stitched together in CS3. I'm gonna try with the 70-200 for the next one.
My first time ever shooting 35mm, back in November of 2016. Taken on my Canon Canonet 28, most likely using expired fujifilm
I really like the portability of strobe lights. I'm talking about the speedlite units, stands and umbrellas, not the large studio strobes with modeling lights. Fortunately with digital the question of whether or not the strobes fired is immediately reviewable.
A flash/ambient meter is almost a necessity I've found in outdoor locations. On the other hand, tho heavier and usually needed a power outlet, are the flat panel displays. A bit bulkier but still fairly portable.
John and I were doing a photo shoot in one of the U's studios and using a soft box . . . hence the warm light on John's neck and 2 strobes, with umbrellas. I find it very relaxing to do shoots with good shooting friends.
Two of the members of the "A-Team", Nita Jane, and Barry come onboard when the shoot is more complex and more assistants or creative input is needed.
This was pretty straighforward, and I took the opportunity to do some "wing shooting" of the preparations.
The freight-only Coalville Line crosses the busy A42 Trunk Road at New Packington, on the outskirts of Ashby de la Zouch. On 4th December 2018, 1Q48 Derby RTC - Tyseley LMD passes over the dual carriageway, headed by Colas Rail Freight Class 37 No. 37116, with classmate No. 37219 (out of picture) at the rear. The sight of someone on the over bridge pointing a big lens in their direction must have been a little unnerving for some of the drivers heading south on the A42, but those having seen the test train would have probably twigged that the camera was no speed gun! Copyright Photograph John Whitehouse - all rights reserved
Frankfurt
14 June 2015
Honeywell's Boeing 757, N757HW heading off to Vienna after a short stop. Built in 1983 for Eastern Airlines as N504EA, it then spent 10 years from 1995 to 2005 flying for Airtours/My Travel in the UK as G-JALC, this machine is one of the oldest 757s (l/n 5) still flying.
APT test train about to enter Linslade Tunnel, heading north, on 2 November 1978. The power car is W43000 from the prototype HST, since preserved as 41001.
Pentax SP1000/50mm
Ilford FP4
i volunteered to run a droplet setup at next week's camera club workshop - had to run a few tests to make sure i still knew vaguely how to shoot 'em...
This was taken with a canon 300d digital camera and a 17-85mm lens. It is a re enactment of a civil service test and has been printed in ESL textbooks. Test taking has always been a huge part of Korean society and this depicts how civil servants had to display their ability in calligraphy in front of many examiners.
Heads up to stencillista for the inspiration and technique ( I completely stole his everything)
colours a bit too bright. going to tone them down maybe do vans in different tones of the same colour
today consisted of errands on my bike and designing a poster for my roommate's True West play
this is a test for the poster
You dont alway see a SOQ set running towards Brisbane but on a Sunday but on this day the SOQ set had been running a series of test north of Caboolture and is seen here heading back to Mayne.
NASA's International Sun-Earth Explorer C (ISEE C) was undergoing testing and evaluation inside Goddard Space Flight Center's dynamic test chamber when this photo was taken. Working inside a dynamic test chamber, Goddard engineers wear protective "clean room" clothing to prevent microscopic dust particles from damaging the sophisticated instrumentation. NASA launched the 16-sided polyhedron, which weighed 1,032 lbs. (469 kg.), from Cape Canaveral, Florida, on August 12, 1978. From its halo orbit 932,000 miles (1.5 million km.) from Earth, the satellite monitored the characteristics of solar phenomena about one hour before its companion satellites-ISEE-A and ISEE-B-observed the same phenomena from a much closer near-Earth orbit. The correlated measurements supported the work of 117 scientific investigators who were trying to get a better understanding of how the Sun controls Earth's near-space environment. The scientists represented 35 universities in 10 nations.
Credit: NASA
Image Number: 11-77-6
Date: November 6, 1976
Testing out lighting with Vidarr during our first meeting. We did a shoot yesterday! w00t!
Two pics already posted :
Tests from a NASA event at Summit Point Raceway for my 7D coupled with my 300mm and 70-200. Also had my 5D in hand to make sure it was dialed-in. Finally figured the AF System to work for how I shoot. Really would like to make the 7D work for me. Still undecided though :-/
I built a car for my Crash Test Dummy; heavily inspired [color-wise, anyway] by one from the Test Track queue. This was another quick build [an all-nighter] between larger projects.
Check out all of the pictures at MOCpages.