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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
It's was such a challenge to photograph the 'Rosewater' self-portrait. A learning curve, let's say that! Luckily I had my boyfriend who is always on hand to help me out with the camera and getting the right shot etc. But I learnt as to how the sun effects the way the water looks and feels in an image. I was in the pool for the best part of an hour waiting for the sun to go behind the clouds, we then had only minutes to shoot and then the sun would make an appearance again. It got frustrating but I knew I wanted the lighting to be flat with no shadows etc. So we persisted and in the end managed to get the right shot (see previous image!).
I thought I'd post this here to show more of an insight into how the sun creates different platforms, and it's taught me about patience and persistence when developing the vision in my minds eye.
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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.
Spanish built Alstom/GM-EMD Colas Class 67 Bo-Bo’s no.67 023 "Stella" leading, with 67 027 "Charlotte" bringing up the rear of the high speed test train, as it passes through Bolton Percy on the ECML.
37610 (with 37116 on the rear) is seen leaving Fort William Yard with the 16:54 test train to Crianlarich. The train reversed in the station with 37116 then leading.
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
The ferry will turn up a few hors later around the time of the next passenger train, here is the test train arriving at a quiet Fishguard Harbour. 43013 and 43062 on 1q15 Landore - Derby.
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...
Test of an RGB with UVI365, IR 2 and mixture UVI365/IR2
Data:
ir2_20160723_083825_202_l2b_v10
uvi_20160723_084354_283_l2b_v21
Venus taken by Akatsuki spacecraft
Credit: JAXA/ISAS/DARTS/Thomas Thomopoulos
From this past weekend's test shoot, just a quick export without any serious editing. This was my first real shoot with the Nikon D300 - so far I'm much happier with the color response than I've been with previous bodies.
Lighting was a single Profoto Acute2 head in a Mola Demi beauty dish, feathered forward to even out the coverage.