Data of the stratospheric balloon launched on 2/26/2004
For BEXUS II (Balloon Experiment for University Students)

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Details of the balloon and launch operations


 
Launch site:European Space Range, Kiruna, Sweden  
Launch team: SSC
Balloon: Open balloon (zero pressure)
Volume: 10.000 m3
Serial number: -
Flight identification number: -
Campaign: BEXUS 
Payload weight: -
Gondola weight: -
Overall weight: -

The balloon was successfully launched at 11:57 UTC on Febraury 26th and reached a float altitude of 27,6 km at 13:30 utc.

After a flight of near 5 hours due to east, the cut down command was given and the landing took place in the Northern Part of Finland near the Russian border.  

Images


Click to enlarge.

View of one of the gondolas of the BEXUS II project

Balloon inflation

The balloon was released and starts to elevate the payload

Balloon ascent phase

Picture of the fully inflated balloon taken from the payload in flight

© Bexus Project

Description of the payload or experiment


BEXUS II (Balloon Experiment for University Students)

Responsable institution:  Kiruna space and Environment Campus, KRM, Umeå University and Luleå University of Technology
Principal Investigator:  Mr O. Widell (SSC Esrange) / Mr J. Tanhua (KRM)

Sometime before a balloon campaign starts at Esrange every year is launched a balloon to test their technique and logistics systems. The students at Kiruna's different space related educations are offered the opportunity to send their own designed and built experiments with the balloon. The students are from the space engineering programmes at the Department of Space Science and from the technical high school programs.

Students from different years and courses are involved in the project, which means that different groups of students meet and get a chance to work together on the basis of their respective areas of competence. It is the students themselves who lead, design and build the experiments and the instruments destined for the balloon launch.

Most of the data to be collected during the balloon flight is used later in the courses.

This was the second flight of the project and involved the participation of students at Kiruna Space and Environment Campus togheter with pupils from Hjalmar Lundboms school and the space high school, Rymdgymnasiet and also the collaboration from the University of Copenhagen.  

Performance in flight and data obtained


The experiences performed in this second flight were:

::: Student's Gondolas :::

The main plataform called BEXUS II provides support to the rest of experiences. It includes: high definition sampling of analogue signals, serial platform bus for handling of commands and data between ground station and the experiments, GPS-system localization and time, power switching, measuring and distribution, power supply with batteries and a ground station segment for monitoring and controling the BEUXS II platform and experiments.

The experiments to be performed were:

VHI (verification of harddrive integrity) to evaluate the use of a hard drive to store data. This would then eliminate the use of a radio link for experiments that produces large amounts of data.

Chemical Power High Altitude Experiment to study the behavior of Fuel cells and Zinc-air batteries under different atmospheric conditions.

GAMMA-RAY PROJECT that used a Geiger Mueller tube with a good time resolution to detect Gamma Ray Bursts.

BASS (Bexus Active Stabilizer System) a platform which will stabilize a camera.

The project ”solar panels” to test how much power 4 different solar cells deliver depending on temperature, pressure and amount of light.

NAC (Narrow Angle Camera) originally designed for an European satellite project to take pictures in flight by remote command.

G-spot to measure the attitude of the balloon and its payload as well as the shocks during lift-off and landing with 8 accelerometers.

HEAL (2-Hour Extreme Altitude Life-analysis) were organism called tardigrades will be sent up with the balloon to be exposed to the extreme environments that can be found along the journey to investigate how the environment has affected its DNA.

::: Esrange Gondola :::

Test of the E-Link system with maximum data load versus achieved flight range.

External references and bibliographical sources


  BEXUS project web site Department of Space Science, Umeå university och Luleå university of technology
 Department of Space Science Luleå University of Technology

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