Another Hard Day in the REXUS Programme

Today started of a bit better then the day before considering the additional 75% of sleep. The morning was spent listening on different interesting presentations given at the symposium followed by the usual great lunch at the Casino. After lunch it was finally time for us to get some time to enjoy our surroundings. All participants were shipped out on the island of  Porquerolles where the groups was divided. I and David joined some other REXUS/BEXUS students, Adam and Helen on a bike trip to the closest beach. Well at the beach we enjoyed the wonderful water of the Mediterranean, some ice creams at the beach and the lovely  sun. Much to soon it was time to head back for the boat but we still had time for a beer before. Well back at the main land everything happened very quickly since there was a REXUS/BEXUS event planned immediately we did not get time enough to go home and shower which made the dress code very relaxed. This was not a problem though since everyone were in the same situation. Me and David goth our diplomas and then a group photo was taken. We then finally could make it back to the hotel for a shower before the evening continued with beers at the same bar as monday night. Tomorrow will be the last day of the symposium and will end with a vineyard dinner so we are looking forward to that.

EXPLORE rocket video

I know that the blog during the last week have been very poorly updated and I´m deeply sorry for this. Some more detailed posts about the data processing are on their way but in the mean time I just wanted to tip you about the EXPLORE team´s video which they recorded during the launch of REXUS 9 which where launched the day before our rocket. The video is recorded from a camera which where mounted on the side of the payload so they have managed to capture some great shots of the launch.

Due to copyright issues on the music the above clip may not be available everywhere so for those of you who can´t see it there is another clip without music.

Leaving Esrange

After two amazing weeks the time have come to leave Esrange. The team is currently in the car and we left Esrange for about two hours ago. Even if this marks the end of the launch campaign this does not mean that the project is finished. We will have plenty of work to do in order to evaluate the results of the project. This will end up in a number of documents. We also hope to be able to go to the 20th ESA Symposium on European Rocket and Balloon Programmes and Related Research. Which will take place in Hyéres, France, between the 22nd and 26th of may. The final report of the project will be the last version of the SED which will be handed in at the end of June. Under this period we will try our best to keep the blog updated!

The SQUIDMOBILE at the gate of Esrange

First post flight analysis

After the successful launch of Rexus 10 we still have a lot of things to do. There is a lot of data stored on the FFU which will have to be analyzed in order to fully understand how the system has behaved and recover the scientific data gathered by the experiment. This data is stored in the memory inside the e-box and has not yet been extracted as the FFU was wet after landing in the snow, and as water and electronics dont like each other we decided to leave it drying.

But probably you have already seen the video we posted yesterday. The images are impressive, but the main objective of mounting the camera was to film the FFU in order to be able to check how the spheres were deployed. Unfortunately the experiment module was coning (it had a quite high precession angle) and the FFU was lost from the field of view of the camera after a few seconds. However, if one analyzes the movie carefully can extract some useful information. On the pictures you can see some snapshots taken from the camera shortly after ejection, when the FFU was still in the field of view. Of one checks the pictures from 2 to 7 can see the doors of the SCALE systems popping out gradually (all four of them) which means that the SCALE systems were in fact working, as the doors can only be released if the motor of the wire boom systems are working.

The FFU also appears later on in the video. It was however very far from the experiment module and details can hardly be identified. One can see it in the last pictures, on the bottom half of the photos close to the edge of the ejection spring (dont get confused by the brilliant thing appearing on the top of the photos, which is the nose cone of the rocket). We were unlucky enough to have the sun very close to the area on which the FFU was flying, so on the photos it usually appears as a shiny thing close to the spring. There is however a very interesting photo. If one checks the very last picture, one can see the FFU body very close to the edge of the spring and what seems to be two of the spheres close to it.

We do know that at least two of the spheres were deployed, as when we recovered the FFU two of the cables had been damaged during reentry, probably because the motors driving the wire boom systems could not overcome the centrifugal force during retraction and stalled, leaving the spheres on the free airstream, which ripped them off the cable. We will not know surely how they worked until we really process the data, specially from the sensor wheels on the SCALE systems and of the gyros and accelerometers of the FFU, but so far so good.


SQUID in space video recording part 2

REXUS-uppskjutning – Så här kan det se ut

Schemat är späckat så just nu innan avslutningsmiddagen hinner inte riktigt göra en ordentlig uppdatering över veckans sista dagar. Vi lovar att fixa upp bilderna så snart som möjligt.

Istället bjuder vi på en cool informationsfilm om REXUS, som svenska Rymdstyrelsen, SNSB, har satt ihop. Den fokuserar på de sista frenetiska dagarna före uppskjutningen av REXUS 5/6 i Februari-Mars förra året.