REXUS 5 was launched at 6:00 UTC at Esrange,
Kiruna, Sweden. Apogee of the flight was about
The experiment was working nice and it got 89 photos
during the flight. Curvature of earth and the
black space can be seen from couple of the
images. There are also nice photos of clouds.
Tero has started analyzing the inertial data
and we will update the news according
the upcoming results.
Ossi Mäkinen and Juho Heinijoki finished
preparing of the enclosures and fixing the cabling
of the experiment module. The experiment has been
delivered to the rocket assembly team.
SFC2 Flight Software is now ready and works with the
groundcontrol software. The combination has been
tested in ten flight simulations and it worked very
well. SFC2 software was mainly programmed by Tero Huttunen.
Petri Rokka has assisted with the camera interface and groundcontrol
EDC camera power adapter and it's enclosure were
changed because of the original was broken. New
one has better mounting for the pcb. The mass
did not change too much so there should be no
problem for the balancing of REXUS 5.
Itikka was tested with REXUS5 service systems at
Oberpfaffenhofen, Wessling, Germany. All tests
went fine and next on the schedule is REXUS5
spintest and balancing.
Itikka was shipped to Oberpfaffenhofen, Wessling, Germany for
System testing. Shipment left Tampere/Finland 15:13/15.01.2009 and
arrived at 8:17/16.01.2009 to Oberpfaffenhofen/Germany. EDC was
left of the packet and we will deliver it personally. This leaves
more time for software development.
We did some recording with SFC2, IMU2 and
a laptop with GPS receiver to have backup measurement
data for later INS analysis.
Recording was done by driving two different
routes with a car. The routes were 20min
and 30min long and consisted of highways,
suburbs and central area of Tampere city.
Itikka experiment was EMC tested by Eero
Alkkiomäki in TUT EMC laboratory. Only
the emissions were tested for and the test bandwidth was from 30 MHz to 1000
MHz . Performed
tests were MIL-STD-461F RE102 and EN55022. SFC2
passed MIL-STD-461F RE102 and rest of the experiment was slightly
over the limit. EN55022 was passed by whole experiment.
IMU2 was overpressurized to 2.5 bars and sinked
to water. Result was that no leaks were found.
This was a backup
plan because we could not get vacuum chamber due
to a misunderstaning. Thanks to Ossi
Mäkinen for performing this test.
We did one axis vibration tests to both SFC2 and IMU2. Only sinusoidal tests
were done because of the capabilities of the shaker. SFC2 reached 1.93kHz and IMU2
did work on whole scale. Electronics were running during the tests and
no problems were detected. We have inertial sensor data recorded with 1000Hz frequency of
the IMU2 test.
In the temperature test IMU2 and SFC2 were running in temperature chamber. Chamber was
first freezed to -55 C and SFC2 electronics reached -30 C. Then temperature was risen to
-40 C and we started recording of
inertial and temperature data and the chamber was slowly risen to +55 in 48 minutes. No problems
Itikka experiment was filmed in Castors workshop and the
team leader was interviewed about Itikka project and REXUS campaign.
08.01.2009 and 11.01.2009
It took two nights to calibrate IMU2 in two differents temperatures.
First night we calibrated accelerometers in -10 C. Total of 6 positions with
6 hours of freezing of the turn table and IMU2 enclosure and 2 hours of actual measurements.
The second calibration was longer because of using turn table to calibrate gyros
and it consisted of 6 different turning speeds in 3 different orientations + 3 additional
orientations for accelerometers.
We did all measurements needed for testing the calibration setup. Measurements consisted of
rotating the IMU2 in 3 positions with 4 differents angular velocities and measuring the average of
the angular velocity for each gyroscope and average acceleration of the accelerometers. We also
used 3 opposite positions of the originals to measure the average values of accelerometers.
Because of the rotating nature of the turn table all data was transfered over a wireless radio
modem to a recording computer. During rotation IMU2 and radio modem got power from two sealed lead
After long and painful debugging of the 1553 electronics and
software we discovered that main reason for IMU2 not recognising
the packets sent by SFC2 or the 1553 analyzer was a wrong kind of
clock signal. As we switched to a signal generator to drive the
clock signal for hi6110 everything started to work fine. Hurray!!
Asser Vuola did great work with the machining center to finish most of
the remaining parts of the SFC2 enclosure like the cover and the heat
transfer plate. This step made possible the final assembly of SFC2.
Once the assembly was possible Eero Alkkiomäki did not wait until
the next day. He immediately begin to work with the integration of
electronics and connectors to the enclosure. After a few hours the
integration was almost ready.
Thanks to Eero we also have a nice Break Out Box for testing the REXUS
interface. It has switches for lift-off and start of recording events
and necessary adaptors to connect SFC2 via RS422 to a remote computer to
validate telemetry data and control the experiment.
Results of all this is testing ready SFC2.
Tero Huttunen achieved to get most of the
remaining SFC2 drivers finished in one evening (Bootloader,
Data-flash and the REXUS interface). Only missing SFC2 driver
is the SD-card driver.
IMU2 software is also closer to finish on the driver side.
Working drivers include now internal and external ad/c, serial
driver and a timer. IMU2 has also almost working data flash for external
parameters. Even the MIL-STD-1553 driver has started to communicate
with the hardware.
Next step with the software is making the main program for SFC2 and
preparing IMU2 software for calibration.
IMU2 got it's first programming after a careful testing and finalizing
of it's power supply and cpu board. It flashed the both debug led's
with a timer interrupt. Next on the list is programming of
the serial port driver and the analog digital converter driver.
Both are important step torwards the calibration of the sensors.
Asser Vuola started machining the EDC mount.
It is machined with 3.5 axis Makino CNC machining center
which is provided by TUT / Department of Production engineering.
Itikka experiment has now a brand new website design thanks to Eero Makkonen, a member of
First data packet was succesfully sent over MIL-STD-1553B bus between SFC2 and the IT 553 analyzer.
- 11.05.2009 - Itikka added to RTEMS Wiki.
- 21.04.2009 - Itikka article (6 pages) in Tähdet ja Avaruus 3/2009
- 16.04.2009 - Itikka experiment in Taivaan taidetta exhibition all summer
- --.04.2009 - Itikka in YLE A-STUDIO TV show
- --.04.2009 - Itikka in YLE morning tv show
- 25.03.2009 - Itikka in YLE PRISMA TV show
- 09.03.2009 - Itikka article (1 page) in Tähdet ja Avaruus 2/2009
- 12.02.2009 - Castor Interview with a newspaper (Sunnuntaisuomalainen)
- 09.01.2009 - TV filming of Itikka experiment
- 12.12.2008 - Itikka presentation to Atheros company
- 31.10.2008 - Itikka mentioned in national morning tv show
- 30.10.2008 - Itikka in
local TV news.
- 17.10.2008 - Article about Castor/Itikka in
- 01.10.2008 -
Experiment sponsor leaflet done.
Will be sent to Supikoira1 sponsors.
- 07.09.2008 -
Supikoira rocket was succesfully launched at military area in finland (06.09.2008).
Itikka was mentioned in many news articles about of the Supikoira launch as the Castor's next project.
- 11-13.07.2008 - Participation to
Jämi Fly In
which the main event of Finnish Aeronautical Association (FAA)
- 11.07.2008 - Itikka
to Jämi Fly In event (web version with reduced resolution)
Article about Castor/Itikka in Tekes magazine
Euroopan tiede ja teknologia 3/2008 (finnish)
- this website
16.04.2009 - Supikoira / Itikka presentation
Castor gives a lecture about Supikoira and
- Location: TUT, Sähkötalo, S1
- Time: 16:00-18:00.
03.12.2008 - REXUS BEXUS Presentation - Olle Persson SSC
Olle Persson will give a presentation about REXUS
BEXUS Student Program.
- Location: TUT, Tietotalo, TB104
- Time: 14:15-15:00.