Friday, 31 August 2012
With this image we wish all of you a very good weekend!
As the dual RBSP spacecraft trajectories cross through regions magnetically connected to the subauroral / mid-latitude ionosphere, onboard data on radiation belt electric and magnetic field and energetic particles will be complemented by simultaneous ionospheric measurements from Millstone Hill's wide field MISA steerable antenna and flow velocities from the SuperDARN radar network, allowing studies of the still poorly understood details of magnetosphere-ionosphere coupling.
NASA also published the launch video (with sound!).
Text: Philip Erickson, photo from the announcement, where there is a larger version available. Image credit: NASA/Jim Grossmann.
Thursday, 30 August 2012
For more details, please refer to the blog post about Lag-Profile Inversion of the Finnish KAIRA Station. Our colleagues of the Sodankylä Geophysical Observatory (SGO) established KAIRA for EISCAT_3D prototyping work, which is off to a great start after this initial work.
Image: Juha Vierinen, Sodankylä, Finland.
Wednesday, 29 August 2012
observatory. A couple of nights ago, some participants went out onto the river in the late evening in order to have a sauna away from the shore and watch the moon rise above the river.
Photos: Thomas Ulich.
Monday, 27 August 2012
National Science Foundation on the US radar facilities. Please find a programme of the lectures on-line here.
During the rest of the afternoon, the students are split into three groups. As groups they will work through some examples of the use of the Madrigal data base, in which most incoherent scatter radar data are stored. Accessing Madrigal is the most efficient way to start using ISR data, and interfaces are available for Matlab, Python and IDL, but full access is possible also through a standard web browser.
Photos: Thomas Ulich.
Wednesday, 22 August 2012
The 21st session of ERCA (European Research Course on Atmospheres) will take place in Grenoble, France, from 7th January to 8th February 2013. The course is intended to students enrolled in PhD programmes, young scientists and engineers from universities and public/private research institutes wishing to complete their education with a very comprehensible research course about atmosphere, climate, and climate change studies.
The 21st session of ERCA will be organised in 6 different sessions (25 hours each) held in Grenoble.
- Atmospheric chemistry and atmospheric composition changes;
- Solar activity, space weather, planetary atmospheres;
- Earth science system;
- Earth climate system and the science of climate change;
- Experimental techniques and research methodologies for the atmospheric sciences;
- Hydrology and precipitation: water cycle in climate change;
- Climate change impact and society.
It also includes a 1-week practical course (lidar and other observations techniques for atmospheric and planetological observations) held at Observatoire de Haute Provence (Southern France).
A number of student assistanships will be available.
Deadline for Registration: 30 September 2012.
More information at http://erca-school.eu.
Text adapted from Paolo Laj; photo Wikimedia Commons (source).
Tuesday, 21 August 2012
- A comparison of two different techniques for deriving the quiet day curve from SARINET riometer data, by J. Moro, C. M. Denardini, E. Correia, M. A. Abdu, N. J. Schuch, and K. Makita, ANGEO, 2012, Vol.30, pp. 1159-1168, SRef-ID: 1432-0576/angeo/2012-30-1159, http://direct.sref.org/1432-0576/angeo/2012-30-1159.
- Plasma parameter analysis of the Langmuir decay process via Particle-in-Cell simulations, by M. A. Diaz, M. Zettergren, J. L. Semeter, and M. Oppenheim, ANGEO, 2012, Vol.30, pp. 1169-1183, SRef-ID: 1432-0576/angeo/2012-30-1169, http://direct.sref.org/1432-0576/angeo/2012-30-1169.
- Underlying mechanisms of transient luminous events: a review, by V. V. Surkov and M. Hayakawa, ANGEO, 2012, Vol.30, pp. 1185-1212, SRef-ID: 1432-0576/angeo/2012-30-1185, http://direct.sref.org/1432-0576/angeo/2012-30-1185.
- Simulation study of the large-scale modification of the mid-latitude F-layer by HF radio waves with different powers, by G. I. Mingaleva, V. S. Mingalev, and O. V. Mingalev, ANGEO, 2012, Vol.30, pp. 1213-1222, SRef-ID: 1432-0576/angeo/2012-30-1213, http://direct.sref.org/1432-0576/angeo/2012-30-1213.
Friday, 17 August 2012
|Lars-Göran Vanhainen of EISCAT Kiruna explains the changes to Jorge Chau, Director of the Jicamarca Radio Observatory.|
|The dipole ring feed, which is going to replace the secondary reflector in the 32-m dish antennae, i.e. the small mirror suspended by the tripod.|
|Lars-Göran Vanhainen explaining the front-end to Jorge Chau.|
|A close-up of the front-end.|
|Aluminium frame, onto which the base plate of the ring feed will be mounted.|
Thursday, 16 August 2012
The candidate's research activities should focus on experimental investigations of the Earth’s atmosphere by means of radars and sounding rockets from the ground to the lower thermosphere. He will lead the division 'Radar Soundings and Sounding Rockets' at the IAP and is expected to co-operate with the two other divisions of theoretical and experimental atmospheric research (see www.iap-kborn.de for more details). The candidate should have experience in leading a team of scientists and in applying for research funds. The professorship is assigned to the Faculty of Mathematics and Natural Sciences at the Rostock University. The candidate is expected to take part in the training and lecturing programme of the faculty, including the supervision of post-graduate and doctoral students.
Candidates should have an excellent scientific standing and an international reputation in their research field. They should have a professional degree (PhD and habilitation, or equivalent qualification). The position is subject to the conditions of employment of the State of Mecklenburg-Vorpommern (LHG- MV §58 and §61). The salary is according to TVL-MW (salary class 15). Applications of female candidates are encouraged. In case of equal qualification, handicapped candidates are given preference.
Applications including a curriculum vitae, a list of publications, reprints of five important publications, documentation on previous research/teaching ex- perience, and a description of future research plans should be submitted by 17th September 2012, to Leibniz Institute of Atmospheric Physics, c/o Professor Dr Franz-Josef Lübken (Email: luebken -at- iap-kborn -dot- de), Schloss-Str. 6, 18225 Kühlungsborn, Germany.
Deadline for applications: 17th September 2012.
Text: Franz-Josef Lübken; Photo: Gerd Baumgarten, both at IAP Kühlungsborn, Germany.
Tuesday, 14 August 2012
- Wave influence on polar mesosphere summer echoes above Wasa: experimental and model studies, by P. Dalin, S. Kirkwood, M. Hervig, M. Mihalikova, D. Mikhaylova, I. Wolf, and A. Osepian, ANGEO, 2012, Vol.30, pp. 1143-1157, SRef-ID: 1432-0576/angeo/2012-30-1143, http://direct.sref.org/1432-0576/angeo/2012-30-1143.
- Multi-year investigations of aerosols from an island station, Port Blair, in the Bay of Bengal: climatology and source impacts, by S. Naseema Beegum, K. Krishna Moorthy, Mukunda M. Gogoi, S. Suresh Babu, and S. K. Pandey, ANGEO, 2012, Vol.30, pp. 1113-1127, SRef-ID: 1432-0576/angeo/2012-30-1113, http://direct.sref.org/1432-0576/angeo/2012-30-1113.
- Solar flares as proxy for the young Sun: satellite observed thermosphere response to an X17.2 flare of Earth's upper atmosphere, by S. Krauss, B. Fichtinger, H. Lammer, W. Hausleitner, Yu. N. Kulikov, I. Ribas, V. I. Shematovich, D. Bisikalo, H. I. M. Lichtenegger, T. V. Zaqarashvili, M. L. Khodachenko, and A. Hanslmeier, ANGEO, 2012, Vol.30, pp. 1129-1141, SRef-ID: 1432-0576/angeo/2012-30-1129, http://direct.sref.org/1432-0576/angeo/2012-30-1129.
Friday, 10 August 2012
homemade radar, a very basic device capable to measure Doppler shift and thus velocity of a target. Of course we had to try and bring the radar to the hockey game to collect some data. The colour plot above shows one minute of radar data. The colour scale is in m/s. For comparison: 5 m/s equals 18 km/h or 11.2 mph; last night in the London 2012 Olympics, Usain Bolt won gold over 200 m with a time of 19.32 s, which means an average of 10.35 m/s, and even more impressively, David Rudisha broke his own world record over 800 m and won gold with a time of 1:40.91, which averages at 8.93 m/s. The radar data suggests that some of the scientists moved even faster. This might be due to several reasons: during the hockey game, there wasn't one distinct radar target, but 12 players, many of which would be in the radar beam (or a side lobe) simultaneously. Moreover, the players are waiving their arms and hockey sticks about, creating an amplitude modulation on top of their own speed, a bit like the heavy ion in a cloud of thermal electrons. Also, during the game, the players do run only for very short distances, and thus these very short bursts of high speed may well exceed the speed of sprint athletes, who have to keep up a fast pace for the duration of the race.
Radar data: Phil Erickson; photos and time lapse: Thomas Ulich.
Tuesday, 7 August 2012
- Solar wind plasma interaction with solar probe plus spacecraft, by S. Guillemant, V. Génot, J.-C. Matéo-Vélez, R. Ergun, and P. Louarn, ANGEO, 2012, Vol.30, pp. 1075-1092, SRef-ID: 1432-0576/angeo/2012-30-1075, http://direct.sref.org/1432-0576/angeo/2012-30-1075.
- Auroral kilometric radiation from a nonstationary thin plasma cavity, by T. M. Burinskaya and J.-L. Rauch, ANGEO, 2012, Vol.30, pp. 1093-1097, SRef-ID: 1432-0576/angeo/2012-30-1093, http://direct.sref.org/1432-0576/angeo/2012-30-1093.
- Spatio-temporal structure of Alfvén waves excited by a sudden impulse localized on an L-shell, by D. Yu. Klimushkin, P. N. Mager, and K.-H. Glassmeier, ANGEO, 2012, Vol.30, pp. 1099-1106, SRef-ID: 1432-0576/angeo/2012-30-1099, http://direct.sref.org/1432-0576/angeo/2012-30-1099.
- Multifractal analysis of interplanetary magnetic field obtained during CME events, by M. J. A. Bolzan and R. R. Rosa, ANGEO, 2012, Vol.30, pp. 1107-1112, SRef-ID: 1432-0576/angeo/2012-30-1107, http://direct.sref.org/1432-0576/angeo/2012-30-1107.
Monday, 6 August 2012
Our group hiked up to the peak along a well-made path via countless switchbacks. Instead, one can also take the cable car, but that might turn out more difficult than planned: the queues on the summit for a ride back were endless, and we decided that it'll be quicker to walk back down after enjoying the view and an ice cream. The photo above shows the view away from Banff, on the down a valley of seemingly untouched, endless forest. At the left edge of the photo, the summit station of the cable car can be seen.
Photos: Thomas Ulich; click to enlarge; photos about the measurement stations are taken of information signs on the summit.
Friday, 3 August 2012
The entire event has been filmed with a time lapse camera resulting in a 24-sec movie clip. Another version can be downloaded from the school's web site, which also hosts copies of the lectures.
By the way, if you want to read up on earlier posts about this radar school, or indeed on earlier radar schools, we have included a direct link to posts tagged "radar school" in the menu on the right.
Photo and time lapse: Thomas Ulich.
Thursday, 2 August 2012
The radar is based on a course developed by Greg Charvat and Alan Fenn of the MIT Lincoln Laboratory, and the course materials and instructions are online at the MIT OpenCourseWare site.
MIT Haystack Observatory at Millstone Hill, near Boston, USA. The most prominent parts are the "cantennae," which one can obtain by drinking lots of coffee – which is easily achieved among space scientists, or then maybe in some radar facility's control room in the middle of the night... Some electronics connected to these coffee cans makes a radar, which can be powered by eight AA batteries (two black cases) and which runs at 2.4 GHz, which is a band reserved for, e.g., wireless LAN etc, which means that anyone can use it.
This fully analogue radar can be sampled by simply connecting it to the audio input of a computer and sampling at the standard 44.1 kHz rate of typical sound cards. These data are stored in WAV files, which can then be read into your favourite data analysis software and plotted to give a target's location, speed or even structure.
Photos: Thomas Ulich; click to enlarge.
The second reason for excitement today is that the radar experiments, which were requested by all seven groups yesterday, were run overnight on PFISR, and upon return from the excursion, the readily analysed data was available for study on the Madrigal database. More about that later...
Craig Heinselman, who will head EISCAT from next year, is shielding the sunlight from reflecting inside the lense.
Photos: Thomas Ulich; click to get larger versions.