Showing posts with label ESA. Show all posts
Showing posts with label ESA. Show all posts

Wednesday, 13 December 2017

Objects from the Ariane VA240 launch (Galileo 19, 20, 21, 22) observed from the Netherlands [UPDATED]

image 18:53 ~ 18:56 UT. Photograph (c) Klaas Jobse, Astronomy Project Oostkapelle
click to enlarge

On 12 December 2017 at 18:36:07 UT, an  Arianespace Ariane 5 ES rocket launched four Galileo navigation satellites into space from Kourou, French Guyana, for the European Space Agency (ESA).

Twenty minutes later, amateur astronomer Klaas Jobse (Astronomy Project Oostkapelle) in the village of Oostkapelle on the coast of the Netherlands imaged a phenomena in the sky (photograph above and photographs below). The imagery appears to show the tumbling Ariane EPC (Cryogenic Main Stage) and what appears to be a fuel dump cloud, about 10 minutes after separation of the EPC from the upper stage.

In one of the all sky images, a second trail is visible too (see detail image of all sky image below): this might be the EPS Upper Stage with the satellites, around the moment it shuts down and starts its coasting phase.

All Sky image. (c) Klaas Jobse, Astronomy Project Oostkapelle
click to enlarge
detail of the previous image.
(c) Klaas Jobse, Astronomy Project Oostkapelle
click to enlarge
All Sky image. (c) Klaas Jobse, Astronomy Project Oostkapelle
click to enlarge

detail of the previous image.
(c) Klaas Jobse, Astronomy Project Oostkapelle
click to enlargee
The flashing behaviour of the main trail (the suspected spent Cryogenic Main Stage) is probably due to tumbling after separation from the upper stage. On the first image (the one at the top of this post), which is a 30 seconds exposure, it is flashing 9 times, or about once every 3.3 seconds.

The images were captured by the automated routine meteor fireball patrol camera's of Astronomy Project Oostkapelle, which make continuous photographs of the night sky every clear night.

This is the approximate trajectory of the launch which I reconstructed from the Area Broadcast Warnings and information in the Arianespace presskit. It is approximate only:

click map to enlarge




Update 1, 13 Dec 2017, 23:00 UT:

The map above was based on ascend to the parking orbit of the Upper stage. Below is a 178 x 3440 km, 54.95 degree inclined reconstructed orbit for the EPC Cryogenic Main Stage, fitted to match measurements on the first image (the image in top of this post). Orbital position shown is for 18:56 UT:

click map to enlarge
 The rocket stage probably de-orbitted near the end of the first revolution, at about 20:40 UT.


 Update 2, 14 Dec 2017, 22:45 UT:

An engineer supporting the launch (@Dutchspace on Twitter) provided the info that the EPC Cryogenic Main Stage should have been in a 42 x 3340 km, 55.35 degree inclined orbit after separation and depressurization, with de-orbit at longitude 90.28 W. The elset and map below suit those constraints, and fit the observations from Oostkapelle closely:

click map to enlarge

Ariane EPC r/b                                           42 x 3340 km
1 70004U 17999C   17346.77516204 0.00000000  00000-0  00000+0 0    07
2 70004  55.3500 305.8931 2043588 353.6368 349.8559 11.97683367    04

rms 0.06



Update 3, 16 Dec 2017, 11:00 UT:

The phenomena was also imaged from Germany (see this article in Der Spiegel, which quotes me) and from Belgium.


(I thank Klaas Jobse for permission to publish his photographs. Photographs (c) Klaas Jobse, Astronomy Project Oostkapelle)

Friday, 11 September 2015

Observing the Fregat upper stage with Galileo 9 and 10 manoeuvering into transfer orbit, just 22 minutes after launch

Fregat upper stage with Galileo 9 and 10 after shadow exit, 11 Sep 2015, 2:30:12 UTC
click image to enlarge

Last night (11 Sep 2015) at 2:08:10 UT, ESA and Roskosmos launched a Soyuz from Kourou, French Guyana, with the new navigation satellites Galileo 9 and 10. The payloads are intended for a circular MEO orbit at an altitude of about 23 522 km

Cees Bassa alerted observers in Europe to the fact that the Fregat upper stage (with payloads still attached) would be visible over Europe during it's initial orbit insertion burn, exiting Earth shadow near 02:30 UT at an altitude of about 400 km altitude while cruising over Germany/Denmark. Engine cut-off for this stage of the launch would be 2 minutes later near 02:31:40 UT

This burn brought the Fregat stage and payloads in a ballistic transfer trajectory. A second burn about 3.5 hours after launch then inserted the stage and payloads in a circular orbit, upon which the payloads separated and the upper stage was de-orbitted.

Both Cees and I managed to observe the Fregat near 02:30 UT. This was about 22 minutes after the launch. Cees observed from Drente in the Northeast of the Netherlands(closer to the trajectory and with better observing conditions), while I observed from Cronesteyn Polder at the edge of Leiden in the West of the Netherlands.

Observing conditions were mediocre at my location: the sky was hazy, and light pollution a problem at lower elevations (it can be seen as an orange glow in the image above).

After exiting Earth shadow near 02:30:00 UT at about 45 degrees elevation in Ursa major, the Fregat stage was easily seen by the naked eye as an object of magnitude +2.

Above is one of my images, a 4-second exposure (Canon EOS 60D, EF 2.5/50mm lens, 800 ISO) starting at 02:30:12 UT.

Descending towards the Northeastern horizon the object became fainter, until I lost it in the light pollution and haze about a minute later.

Cees managed to image a developing hazy envelope around the trail low above the horizon (when it was already invisible to me), which is related to engine shut-down near 02:31:40 UT.

Tuesday, 23 June 2015

[updated] Aurora hunter images the last moments of the AVUM (4th stage) from the Sentinel-2A launch

image (c) David Murr, used with permission


On June 23 at 01:51:58 UT, ESA launched a Vega rocket with the Sentinel-2A satellite from Kourou, French Guyana.

About two hours later, US astrophotographer David Murr was watching the sky as part of an aurora watch in Louisa, Virginia. Just after  he had set up, he saw and imaged a "cloudy blob" moving from SE to NW through Ursa major (just above the trees in the image):


After Murr's tweet and image were brough to my attention through a retweet by David Dickinson, I could quickly confirm this was related to the Sentinel-2A launch two hours earlier.

What is visible is probably fuel venting [but: see update below: it could actually be gasses from the actual last engine burn] by AVUM, the Attitude and Vernier Upper Module that assists in putting the payload into its intended orbit after separation from the third stage. The AVUM has liquid fuel engines (the Zefiro third stage has solid fuel engines) and did a final burn, aiming at de-orbiting it lowering its orbit, just 10 minutes before the observation (see timeline here).



The map above shows the predicted track for Murr's Virginia location for Sentinel-2A and the Sentinel Zefiro 3rd stage : it matches the sky track and direction of movement of  the "fuzzy blob" on his image extremely well. There is a small time difference of only a few minutes, but all taken it is very clear this object was connected to the Sentinel-2A launch (the plot is based on orbital elements for the Vega 3rd stage and Sentinel-2A from some hours later: there are no orbital elements for the AVUM).

Murr was not the only one spotting and photographing the object: more photographs by several other US observers are here.

UPDATE 20:35 UT: Jim Cook from Germantown, Maryland, describes what appears to be the actual last burn of AVUM in a post on the Seesat list. Putting all information together, I have come to the conclusion that the fuzzy cloud is not so much a fuel vent, but gasses from the actual AVUM burn.
Also: the press kit talks about a "de-orbit burn" for AVUM, but as AVUM has been catalogued as still in orbit (as in previous cases), it is a burn to lower the orbit rather than a true de-orbit burn.



(many thanks to David Murr for his permission to feature his photograph)

Monday, 10 November 2014

Live blog from ESOC, Darmstadt: Philae (Rosetta) Landing on comet Churyumov-Gerasimenko:

 LIVE BLOG

 
I (am) was on-site at ESA's European Space Operations Center (ESOC) in Darmstadt for the Philae landing on comet 67P/Churyumov-Gerasimenko
This blog-post will be live updated as the events unfold. 
Be sure to hit refresh upon a new visit!
 I will also  be tweeting through @Marco_Langbroek)

15 Nov

01:45 The communications link has broken. This is it. Philae has gone to sleep, perhaps to never wake up again...or will it? So far it has kept amazing us all, after all...!

01:29 Philae has been switched into standby mode. All instruments powered off, but communications llink still active. Time to go to sleep now, brave little friend....

01:00 Battery power is dropping fast but Philae is not giving up! More and more data is being received. This is History written large, with a capital H. Truely epic science History!

00:28 Philae's rotation, over 35 degrees, was successful.
https://twitter.com/philae2014/status/533393729156308992

00:20 Philae is alive and the drill has worked! At the moment, they are trying to rotate the lander to get more sunlight on the panels. I think we can safely say now that nothwithstanding all that went different from what was planned, the mission has become a resounding success!

14 Nov

15:10 Brief recap of the Google+ briefing of this afternoon: Matt Taylor apologizes for #shirtgate. Contacts Rosetta-Philae are very stable. 80% of the most important science data from the first science sequence are now in. Rosetta has not imaged Philae on the surface yet, but there are still images in the pipeline and the search continues.  Holger Sierks suggests that in fact, they should have caught the lander just before touchdown at 500 meter above the surface, and during the first bounce in the images from the first two hours after touchdown, which have not been downloaded yet. These images should give the direction of the rebounce.
Lomatsch told that Philae has not moved at all since finally settling. Philae is in a difficult position however, surrounded by walls, limiting sunlight reaching the solar panels.From what she said, I get the impression that hopes for a lander revival once 67P/ is closer to the sun, should not be too high.
During the Q&A Ulamec indicated that it is unlikely that cometary jets will blow the lander from the surface as activity increases, as it has a too high density.
The DS2 drill is already extended 25 cm below base plate, but as there is a (scheduled) loss of contact right now, it is unsure whether it can/has reached the surface yet. New (and perhaps last) contact with Philae near 22 CET this evening. A command to go into low power mode did however not reach Philae, so it is going to get really close wether the next contact will be successful.


9:55 Philae's batteries will run out of power tomorrow. Coming night the operators will try to rotate the lander such that the largest solar panel will be facing the sun (via @elakdawala)https://twitter.com/elakdawalla/status/533179905610371073

4:55 Although it will be under "very risky conditions", SD2, the core drilling tool, will be employed. it will take subsurface samples that will be analysed by COSAC and Ptolemy, two instruments that o.a. look for organic compounds and determine the isotopic composition of water in the comet. The latter will yield information whether water may have been brought to Earth by comets.
https://twitter.com/rosettasd2/status/533056385819607040

00:45 MUPUS is communicating the first "science" temperatures (but not subsurface yet) https://twitter.com/philae_mupus/status/533040327058534400

13 Nov

23:25 After first attempt failed, second upload attempt of MUPUS commands succeeded!
https://twitter.com/philae_mupus/status/533021560593219584

21:58 The commands to deploy MUPUS failed to upload: https://twitter.com/philae_mupus/status/532998982193397762

20:55 Tonight the MUPUS  (MUlti-PUrpose Sensors for Surface and Sub-Surface Science) instrument will be deployed, for about 20 cm of its 30 cm length. The probe, which contains several temperature sensors, will be slowly hammered into the subsurface. The goals are amongst others to gather data on subsurface consistency, and a subsurface temoperature profile. It also provides calibration data for the thermal mapper onboard the Rosetta orbiter. 

    19:40 More details have been released. Philae bounced twice, at 15:34 GMT (first contact of lander with comet) and 17:25 GMT, before settling on the cometary surface at 17:32 UT. It rotated around the Z-axis (the vertical axis) after the first bounce (this rotation was the first sign yesterday evening that the lander did not settle at first contact). It is working though, although there are indications that some of the solar panels are in shadow (perhaps due to a nearby boulder? [update: it's a cliff]). It hence does not have full power. 

    So that first bounce took two hours, while the second bounce appears to have been mild. As the harpoons did not work, Philae is not well anchored to the comet. This will interfere with some of the planned activities (e.g. coring the subsurface).

    See also: http://blogs.esa.int/rosetta/2014/11/13/philae-the-happy-lander/

    17:20 (This post comes belated as I am still travelling homewards...)
    ESA has released the first panoramic image by Philae. It is obviously a rather dark world out there... Of all the extraterrestrial landscapes imaged, I feel this one beats them all! This truely is a Primeordial world... (photo: ESA)



    16:30 (back on Dutch soil, but stil in the train) The place where Philae finally landed has been located. It is about 1 km offset from the original location. In the image below, the cross is the original landing site, the box where it finally ended up.


    (image: ESA)

    12:05 News now is that Philae is on the comet, but not anchored well. This means the coring of the subsurface cannot happen, which is a bummer. Still, no doubt much new scientific data will be gathered. Given that we knew this landing effort was very risky, we can say Philae is a big success anyway!

    I am at Darmstadt railroad station currently, about to return home to the Netherlands, so this will be my last blog update today for now.

    11:50 CET  Great news! Philae is alive and has send the first images of the comet' surface!
    below you can see one of the lander legs, and part of the surface. The image is a composite of two images taken by Philae's CIVA camera.



    Image : ESA


    12 Nov

    20:25 Gist of the press briefing: some data might indicate that Philae briefly left surface again after touchdown, i.e. it bounced and then settled again at a slightly different spot. Data need to be evaluated now. Next briefing is tomorrow 14:00 CET. No word about those images shown by the French...

    19:10 This is reportedly the first image of the comet's surface (but image is unconfirmed, at least it has not been shown yet here at ESOC):



    18:12 Ulamec just told reporters that a lot is still uncertain about the spacecraft condition and safety. Also said option to try to re-fire harpoons is risky, as the non-working gas thruster cannot produce the counterforce necessary. This mean the counterforce of (re-) firing the harpoons could result in Philae being ejected from the comet surface.

    17:42 Flight controller Geurts reports that the gas thruster indeed did not work, and that the anchors did not fire. Incredible that the landing nevertheless still seems to have been succesful!
    Geurts mentioned they might retry to fire the anchors.

    17:04 Philae has landed!!!!! They are receiving telemetry. Harpoon has been fired, landing gear is in. Its on the surface!!!!

    16:50 Nailbiting at ESOC!



    16:28 Touch down window has started.....fingers crossed!

    15:52 https://twitter.com/spaceflight101/status/532546694593126400 cool image of Philae on its way down as imaged by the Rosetta orbiter! note the three extended landing legs.
    Think about what this image exemplifies: To boldly go where no-one has gone before! Exploration!



    15:18 Image of Rosetta imaged by Philae has been shown now. Descend so far is "going as planned". Image is here:  https://twitter.com/esa_rosetta/status/532537918557265921

    12:33 Deployment of Philae landing gear confirmed.

    12:07 Datalink Philae-Rosetta confirmed! Datalink with both objects is healthy. This is an important moment! Over the next hours Philae data from the descend phase will be relayed to the control center. In about 5 hrs from now, Philae should touch down.

    11:00 My ESOC source tells me that for the cold gas thruster to work, a membrane was to be punctured. And this might actually have happened, but the returned sensor data that should confirm this was "contradictory". So the system might actually work, but it is not certain.

    10:20 First data relay from the still descending lander expected about 2 hours from now. Telemetry plus a picture of th orbiter seen from the lander. The lander will reach the cometary surface in about 7 hours from now. The big wait has started.....

    10:20 Dr Churyumov:


    10:04 Separation confirmed!!! Alea Jacta est, to quote old Julius

    9:50 Matt Taylor: "This is our Longest Day" 

    9:36 Separation of the lander is actually happening now, but we won't know for a while as it takes the confirmation signal 28 minutes to reach us

    9:30 The problem with the cold gas system means they have to land without it. This introduces the risk that the lander will bounce back from the cometary surface because of opposite forces when they fiire the anchor harpoon.

    8:15 We have a GO!

    8:00 CET - The go/no of last night has been delayed. The cold gas sytem of Philae has a problem. This cold gas drives the small thruster on top of Philae that pins the lander to the comet surface in the first few minutes.

    11 Nov - The go/no go decision of this evening has given a 'go' as verdict. Early tomorrow morning there will be a second, and last, go/no go moment.




     (player provides a live stream from ESOC by ESA)

    Monday, 15 September 2014

    Rosetta's landing spot. In 3D. Woah!

    image: ESA

    Put on your red-cyan glasses and take a look at the image above (high-res here on the ESA website). It is the chosen landing site of Rosetta's Philae lander on comet 67P/Churyumov-Gerasimenko. Woah!

    Sunday, 4 May 2014

    Imaging SWARM A and C

    On 22 November 2013, ESA launched SWARM, a group of three futuristically looking scientific satellites (2013-007A, B and C) whose purpose is to map the strength, variation and structure of the Earth's magnetic field. Two of the three operate as a close pair in a similar orbital plane at 460 km altitude, the third at 530 km altitude will eventually orbit at an angle to the orbit of the other two (the orbital plane is currently still quite similar, but that will change over the coming years).

    The satellites look like a cross between a techno aardvark and a vacuum cleaner:

    image credit: ESA

    On the night of May 3-4 I was taking images with the EF 2.0/35mm wide field  in an attempt to recover KH-11 USA 224. I did not recover USA 224 but my images showed a number of objects. Including a serendipitous catch of the SWARM A & C duo (2013-007B & C) crossing through Cygnus near 23:32:02 UTC.

    click image to enlarge


    The yellowish whisps in the image are clouds. SWARM C shows a bright flare near the start of its trail, then the brightness suddenly drops. SWARM A is faint.

    Tuesday, 24 December 2013

    Guest post at ESA's Rocket Science blog

    On request of one of the editors I have written a long guest post for ESA's Rocket Science blog titled:

      "Predicting GOCE re-entry: a citizen- scientist’s view"

    The post details how I tried to forecast GOCE's re-entry time and position, using Alan Pickup's SatAna and SatEvo software. It provides some information about what factors are involved, and what problems you bump into. Basically, it is a consolidation and extension of posts that earlier appeared on this SatTrackcam blog.

    Read the post on ESA's blog here.

    Sunday, 22 December 2013

    Gaia launch event, Noordwijk SpaceExpo



    On 19 December at 9:12 UT, a Soyuz rocket with a Fregat upper stage carrying ESA's 2-tonne astrometric space telescope Gaia lifted off from Kourou in French Guiana. It's destination: the L2 Lagrange point of the Sun and Earth, some 1.5 million kilometer from the latter.

    Gaia artist impression (ESA)

      (wikicommons)

    ESA, the Dutch Research School for Astronomy NOVA, the Netherlands Space Office NSO and TNO organised a launch event at Noordwijk SpaceExpo on the morning of the launch, and Marieke Baan of NOVA was so kind to invite me for this event. As part of the event we all watched the launch Live on a big screen, with live narration by Juan de Dalmau, and next awaited confirmation of the separation of Gaia from the Fregat upper stage and the crucial last bottleneck, the deployment of Gaia's folded sun shield.

    At the launch the audience was 'as silent as a mouse' as we say in Dutch. Applause was there following successful separation from the Fregat stage, and again upon confirmation of the solar shield deployment. The short video below shows the first two of these three moments:




      
    The audience largely consisted of people from the Space Industry and journalists, and apart from watching the launch live on the big screen, they were treated on small lectures by a few of the people involved in the project. Marieke Baan (NOVA) acted as a moderator of the talks.

    After an introduction by Juan de Dalmau we first watched the launch broadcast. This was followed by a very fine lecture by ESA astronomer Rene Laureijs, who detailed what work Gaia will do and what techniques it will employ. Next, Leiden astronomer Simon Portegies  Zwart told us what 'revolution' Gaia will bring to astronomy. This was followed by a technical talk about the development of the equipment by TNO's Wim Gielesen.

     Renee Laureijs (ESA) lecturing

    Over the next five years, this telescope will record positions, distance and proper motion characteristics of one billion stars, creating a detailed 3D map (or 4D, given that movement in time is involved...) of our galaxy. It will do so 50 to 100 times more accurate than previous efforts, and for about 10 000 times as much stars.

    In the course of this work, the satellite is expected to also record positional data on some 300 000 asteroids in our solar system, detect the tell-tale signs of exoplanets with other stars, as well as record Quasars and transient phenomena such as supernovae in other galaxies, not to speak of providing more insights into stellar evolution. It is also expected to measure the bending of starlight by the sun's gravitational field and in this way test Einstein's General Theory of Relativity.

    The only thing it does not seem to do is brew a decent cup of coffee...

    The sensor of the satellite is equivalent to a 1000 megapixel CCD. For about 1 billion stars, Gaia will determine on average 70 positions per object (and in some selected cases more), measured over a 5 year operational period. It will measure their positions, do photometry and determine the object's radial speed. It does so by means of parallax measurements with an accuracy of 0.026 milli arcseconds (!). To give you an idea of this accuracy: it means the positions are pinpointed with no more leeway than the diameter of a Euro coin at the distance of the moon.

    Starting in May 2014, the satellite will produce 40 Gb of data per day, for five years. In other words: an incredible amount of data.

    A Dutch-Italian girl named Gaia was a special guest

    The Netherlands plays an important role in this mission. Part of the initial data processing will be done here. Much of the spacecraft's frame and optical assembly were developed and built by TNO, while Dutchspace built a crucial Real-Time Simulator (RTS).

    Saturday, 28 September 2013

    Hanging out with Astronauts: ESA/DLR's SocialSpace Cologne, 22 September 2013

    (note: click the images with this post to get larger versions)

    It can be safely said that unless you work in the space industry, you won't meet an astronaut very often. So you can perhaps imagine how exciting it is to the average space buff like me, to meet seven of them in one day!

    Now hold that thought, and imagine how surreal the moment becomes when an astronaut (Léopold Eyharts, pictured below) is sitting at your table, in the chair right next to you, casually discussing the merits of the Soyuz versus the Space Shuttle in the same way that others compare a Volkswagen to a Prius...


    Astronaut Léopold Eyharts sitting next to me at SocialSpace Cologne, discussing the merits of Soyuz versus Shuttle

    That certainly is not your average Sunday afternoon....

    The scene I describe happened in the afternoon of  Sunday 22 September at the SocialSpace Cologne meeting organized by the European Space Agency ESA and the German Aerospace organisation DLR.  The meeting took place at the DLR complex near Cologne, Germany.

    SocialSpace is ESA's new name for a Space Tweetup, the new name reflecting that they seek an audience from a wider scope of their social media followers than just Twitter.

    Until a year ago, when I attended my first, the 'tweetup' phenomena was completely unknown to me. Readers of my report on the May 2012 AndréTweetup at ESTEC will remember how I was unsure what to expect, half of me fearing that I would be confronted with 70 Sheldon Coopers plus a handful of Wolowitzes, dressed up in trekkie costumes...

    (incidentally, there was a trekkie among the SocialSpace attendants this time, dressed up as Mrs Spock. Yes, Mrs Spock...: in stockings, and complete with pointy ears).

    In reality, these tweetups turn out to be interesting and fun, the people involved generally quite sane and very nice, and an occasion where you make new friends. Some of these I now met again, in the context of this SocialSpace Cologne event, and I discovered that this proces of meeting attendants you know from a previous tweetup, together with the fact that you make a bunch of new like-minded acquaintances, is an important part of the social process of this kind of meetings. For example, I met Eico and Alex Neumann again (@Travelholic and @4tuneQkie on Twitter), even though they did not participate in the actual tweetup SocialSpace this time. They were however present at the informal social gathering at Brauhaus Sion the evening before the event.

    SpaceKoelschX the evening before SocialSpace: 40 Space tweeps, beer and schnitzels

    This unofficial pre-gathering called SpaceKoelschX consisted of some 40 people gathering for Kölsch (local beer), schnitzel, bratwurst, bratkartoffeln and a general swell time on the evening before the SocialSpace event. Most of them were SocialSpace attendants, and some of the ESA social media people were there as well. But the group also included people from previous tweetups that were not selected to attend this time, but came to Cologne on their own volition to visit the German Aerospace Day, a huge event which attracts about 100 000 visitors.

    The ESA/DLR SocialSpace event itself took place the next day in a large tent on the vast DLR grounds bordering the airfield near Cologne, in the context of the already mentioned bi-annual German Aerospace Day.



    two fish-eye views into the SocialSpace tent

    The 60 attendants were selected from a large group of active social media followers who applied to a call spread through the ESA/DLR social media accounts (i.e., Twitter and Facebook). These lucky ones selected, including yours truely, got treated to a special program of lectures, a VIP tour through the DLR and ESA facilities, as well as a meet-and-greet with a whole bunch of astronauts.

    And when I say "a whole bunch", I truely mean: a whole bunch. At a certain moment our SocialSpace tent on the DLR grounds started to teem with blue flight suits, to the point where I started to mutter: "we must find the nest and destroy the eggs!".

    The image below shows you, from left to right: Reinhold Ewald, Thomas Pesquet, André Kuipers, Alexander Gerst, Frank de Winne, Léopold Eyharts and Andreas Mogensen:


    Part of the tweetup SocialSpace tradition seems to be the presence of a number of mascots. I have covered Hugh the bear before in my report on a previous tweetup: present this time were a host of other mascottes, ranging from a Space Barbie to a Pink Little Dragon to Camilla the Space chicken. I must admit, this is a part of the Space tweetup SocialSpace folklore that I still have to get used to...

    Me posing with Pink Little Dragon and Camilla the Space chicken

    @projmgr and Space Barbie

    @4tuneQkie with Camilla the Space Chicken and Pink Little Dragon during the SpaceKoelschX
    ESA's Daniel Scuka (right) and another ESA employee who's name I do not know DLR's Elke Heinemann with Paxi, ESA's kids mascott. A life-sized version of Paxi visited us later.

    While this all might make an impression of Space oddities, there was serious business as well. We got treated to a fine series of lectures that day by several ESA and DLR scientists, astronauts and a test pilot.

    After we were picked up at Porz-Wahn station and brought to the venue by bus, the traditional handing out of badges, T-shirts and goody bags took place. After brief general introductions by the organizing team of ESA and DLR, we all shortly introduced ourselves. One of the nice things of large ESA tweetups like this is the very international vibe. The attendants to this SocialSpace came from all over Europe and even beyond, including the US and Canada.

    Next we all set up shop with our laptops and other devices, from which we started to Live tweet the event. After all, it is a tweetup, n'est ce pas? We did it so well that #SocialSpace became a trending topic for a while. Two of the attendants even established a live webcast of the event.



    The series of lectures started with ESA's Robert Meissner lecturing about the use of satellites for remote sensing. Apart from breathtaking satellite imagery, his lecture provided a good overview of the kind of remote sensing observations satellites can perform, and their practical application. Keeping an eye on crop production and soil and biomass degradation are important applications, for example.

    Apart from modern imagery and their application, Meissner also showed us the very grainy first image of earth ever taken by a satellite, over 50 years ago. With a jump to the future, he announced that the GMES/Copernicus data, an ambitious Remote Sensing program by ESA, will be Open Access.


    Sometimes satellite images contain baffling things. In the image above, Meissner shows us a giant geoglyph of the Egyptian god Horus that is visible on satellite images of an area in the interior of Australia. It was probably created as a joke by the Oz Army Corps.

    The next lecture by Jens Danzeglocke connected to the previous lecture by taking a detailed look at the role European spacecraft (amongst others) play in disaster crisis management. The information exchange network the spacecraft play a role in, helps local authorities to quickly assess damage from natural disasters and coordinate disaster relief efforts based on these results. Most of these activities (about half of them) concern flood disasters, and Danzeglocke told us that radar satellites play an important role in these, as flooding disasters tend to be accompanied by cloud cover. The international Space charter the European space agencies take part in covered over 400 disasters in 110 countries since  2000.

    Next another Jens, biologist Jens Hauslagen, lectured about "food in space". This was an interesting lecture about research into the useful application of waste recycling for crop growing in a closed system (e.g. a Space Station). Did you know that one human produces 10 kg of urea, 110 kg of 'organic waste' (that is: poo) and 100 kg of left-over food each year? In a closed system, these have to be recycled, and Hauslagen works on a series of very intricate ways to do this, including all kinds of filters but also small bio-organisms and even fish. Not only does this reduce waste: by recycling it enables the growth of food in long duration missions. His work has a down-to-earth application too: for example, there is a Maroccan town that recycles leftover waste from its fruit- and vegetable markets with techniques developed by Hauslagen and his team.

    DLR test pilot Steffen Gemsa

    The next speaker was DLR test pilot Steffen Gemsa. This is one of the pilots who took off in a research aircraft to fly into the volcanic ash cloud during the April 2010 Icelandic volcano crisis. Yes, you read that right: all over Europe aircraft were grounded, and this guy deliberately flew into the ash cloud. It's part of his job, that also includes testing aircraft under specific conditions, and conducting research flights with scientific equipment. It was an interesting lecture, as a result of which I learned the interesting bit of trivia that there are only five (5) test pilot schools worldwide.

    Following Gemsa, Manuel Mezt and Holger Krag of ESA and DLR talked us up to date on all matters concerning Space Debris, ways to detect them and ways to mitigate the dangers of them. This included some results of simulations, and visualizations of all space debris in orbit around the Earth. Which is 93% of all objects currently in orbit.

    Manuel Metz visualizing all object in orbit

    Krag told us that every day some satellites are hit by (very) small particles of space debris smaller than 0.1 mm. The number of particles has dramatically grown over the past years due to a Chinese ASAT test in 2007 and a collision between an old Russian rocket booster and the Iridium 33 satellite in 2010. Krag made clear that if we continue this way, spaceflight will soon become impossible. Hence, measures are necessary to reduce the amount of space debris.

    One way to reduce space debris is by making objects decay faster. This can be done for example by fitting spent rocket boosters and decommissioned satellites with solar sails. These sails increase drag, reducing on-orbit lifetimes.


     Krag: fitting satellites with solar sails after decommision will speed up their decay

    Incidentally, Dutch astronaut (ehrm, pardon: European astronaut of Dutch origin) André Kuipers would later tell us about his experience with space debris too: during his stay on the ISS in 2012, they had to do two diversion manoeuvres plus a retreat into the Soyuz capsule because of close encounters with larger space debris.

    After I asked a question in the discussion, Manuel Metz came over to me at the start of lunch, and told me he actually reads my blog. Wow!

    Lunchtime also served as an hour off to freely roam the DLR grounds. Together with @Susivic I made a short visit to the airfield to see some of the aircraft there, including a Eurofighter:


    Eurofighter, the jet our government did not buy

    Incidentally, this was also the moment we first glimpsed André Kuipers, whom would later visit us in the tent.

    When we came back from our short stroll over the DLR Open Day, DLR chairman and ESA director Jan Wörner and Thomas Reiter briefly took the stage.Whenever you see suits on stage, you know they will talk politics. Space politics in this case, with a brief discussion of future plans and goals. Reiter made the interesting statement that "I can believe we will perhaps see humans return to the surface of the moon in the next decade".

    Next came a series of lectures all connected to ESA's Rosetta sampling mission to comet Churyumov-Gerasimenko. The first lecture, a grand overview of this exciting mission to land on a comet (!), was by project PI Gerhard Schwehm, who was involved when the mission was conceived in 1985 (!) and now will see it completed just before his retirement. In the original plans comet Wirtanen was the target, but when the launch suffered a  delay, comet Churyumov-Gerasimenko was selected.


     Schwehm

    After Schwehm, and as an intermezzo, the astronaut and my fellow countryman André Kuipers took the stage, as a replacement for Samantha Cristoforetti who at the last minute could not make it.

    I decided that the Geek code in this case as a rare exception does allow for a selfie:

    Selfie with astronaut in the background

    André told various anecdotes from his PromISSe mission in 2012 (the longest ESA mission onboard the ISS), including the short-circuit in the solar panels, the temporary retreat into the Soyuz because of a dangerously close encounter with a large piece of space debris, and the fact that all three of them threw up after their Soyuz capsule landed in the Kazachstan steppe. He told us astronauts need half a year to recover from a spaceflight and that the bone loss suffered during a long ISS stay might actually never fully recover. The unknown long-term effects of cosmic radiation are also a concern.

    Kuipers stated he welcomes commercial spaceflight as long as it is done safely, and he said he believes the SpaceX Dragon will one day fly astronauts.

    Kuipers was one of the two astronauts grappling and hooking up the first DragonX capsule to the ISS. Later that day, when the astronauts present intermingled with the SocialSpace attendants, he would tell the story of docking the Dragon in more detail:

    St Kuipers, retelling how he slew the SpaceX Dragon in an epic heavenly battle

    Stephan Ulamec and Koen Geurts next lectured on details of the Philae lander that is part of the Rosetta mission effort. Ulamec told us that since no-one has ever landed on a comet before and we actually know very little of the make-up of the nucleus of the comet in terms of surface condition and density, it is a very tricky thing to do. Another challenge is the long-term operation of the spacecraft without RTG's to provide energy (Rosetta/Philae has solar panels only).

    The lander is actually washmachine sized and the landing will involve a bit of Space Whaling: the probe will fire two harpoons into the cometary nucleaus and rope itself in. Its first act will then be to take a 360 degree panorama to see in what position it landed. Ulamec succinctly summed up the scientific importance of the project by stating: "If you want to get to the pristine material, you will have to land there" (with "there" being the comet, which is made up of pristine materials from the formation of our solar system).

    After these highly interesting lectures, it was time for our VIP tour through the EAC facilities. We were divided up in two groups, each of which  was met by an astronaut (in my group's case, Thomas Pesquet) who would act as our guide. Pesquet did not spare us the gory details: at the Neutral Buoyancy Facility, he told us astronauts frequently lose a fingernail while practising in the suit in what I am apparently not allowed to characterize as a giant swimming pool.

    Columbus module mock-up in the EAC Neutral Buoyancy Facility
    Apart from the Neutral Buoyancy Facility, we also got a quick glance at the only existing life-size mock-up of the ATV, which made me realize how big the ATV's actually are. Next, Pesquet took us to a place rarely visited by outsiders: ESA's  Eurocom control room, where they monitor and control all kinds of European things going on in the International Space Station:

    Eurocom

     Thomas Pesquet explaining things in the Eurocom control room to us

    Geek humor in Eurocom

    After this first truely Close Encounter with an alien astronaut, we went back to the SocialSpace tent where we got a very cool demonstration by ESA's  Advanced Concepts Team, who work on some very geeky stuff. They demonstrated a quadcopter drone controlled by an iPad app, simulating the ISS in a game environment. The app might one day actually help finetuning techniques so drones (or spacecraft) can automatically assess distance.

    the drone


    Then it was time for more astronauts again. Alexander Gerst who had elsewhere just completed a press conference where he revealed the name of his upcoming ISS mission, Blue Dot, and Thomas Pesquet who earlier was our guide at  the EAC tour, took the stage.

     Thomas Pesquet (left) and Alexander Gerst (right)

    They turned out to be a golden comedy duo, with very witty retorts between the two. Thomas Pesquet next asked the audience for suggestions what to do in terms of social media activities when he is in the ISS, "since about everything already has been done by now...". May I suggest a weekly comedy show from space perhaps?

    Then the moment came where the tent suddenly started to teem with an overload of astronauts. Seven of them took the stage, and next intermingled with us by sitting down among us at the tables, answering questions and relating experiences. At this point, we had a significant part of the European astronaut corps hanging out with us!


     Léopold Eyharts, who went to MIR in a Soyuz in1998 and to the ISS in a Space Shuttle in 2008, sat down next to me and told us the ride up is better on the Soyuz, but the journey down is much more comfortable on a Shuttle. One of the reasons which he mentioned for that verdict was the constant swinging of the Soyuz capsule under the parachute.

    Apart from listening to Léopold Eyharts, I listened to André Kuipers and later had the opportunity (thanks to Suzanne Pieterse (@Susivic), who handled the camera) to have my picture taken with him. He also signed a folder of postcards for me and my SocialSpace badge. Which made me tweet, in a Sheldon Cooper moment: "Now I have his DNA!"



    André Kuipers kindly posing with me

    signed badge and postcard folder


    With this, the day finally ended. Or more or less: there was an informal drink afterwards, which saw more opportunity to talk to astronauts, various ESA people and other attendants.

    ESA's Social Media guy, Daniel Scuka, talking to two attendants


    Around 18:45 I left for the station for the ICE journey back, but not after grabbing a quick bite with Lynn van Rooijen (@lynnvr) at the trainstation. I was knackered when I arrived home, well after midnight: but it had been worth it. This was a cool day with an overload of astronauts, a highly interesting lecture program, and lots of very nice people. I would not have wanted to miss it!

    I warmly want to thank the ESA/DLR organizers, and specifically Daniel Scuka, for inviting me to this wonderful day and all the good care they took of us.


    (Note: photographs with this report were taken with two cameras: my Canon, and a rather old and decidedly less quality iPhone. So apologies for the bad quality of some of them)