Pills of Radioastronomy
You can find some notes regarding radioastronomy in general and also a short history of this important subject.
Articles
Some articles, presentations, laboratory reports and other information useful to cope with Radioastronomy. This subject is very difficult to explain and index in detail. The articles are all written in our own language (Italian) and in this page you can find a little description of each one.
The Radiotelescope
This text is very interesting for people who want to build a radiotelescope using a common television.
Laboratory Report
How to create a radiotelescope for the study of meteoric swarms. This research was conducted by a group of students of the University of Trent (Italy) for the exam called “Esperimentazioni di Fisica III”. We wish to thank for the collaboration Giorgia Vicentini and Francesco Zanon.
How to construct a Radiotelescope
This is a PowerPoint presentation regarding our project intended to study the meteoric swarms in the vlf waveband.
Basic information
This is another PowerPoint presentation regarding radioobservation compared with visual observation.
Meteoric Swarms
In order to recognize vlf signals we have to know meteoric swarms. In this session there are some charts regarding meteoric swarms in pdf form.
Short Introduction to Radioastronomy
A general vision of radioastronomy: present, past and future. The origins of radio waves, what we can observe in the sky, the radiotelescope and the Italian radio observatories.
Meteoroids in radio and detailed study of interstellar meteoroid
This text was written for a lesson of the course of Radioastronomy at the University of Padova (Italy). You can find also some information about Radar-Astronomy to better understand the subject. (Appeared in Astroemagazine, n. 26, 2002).
Amatorial Radioastronomy
This text pays particular attention to some problems: Is it worthwhile to research on Radioastronomy? Which frequency band should we use? It gives an interesting example.
Meteors in HF waveband
A PowerPoint presentation presented at the First National Meeting of Amatorial Radioastronomy. You can find some scientific experiments to make inquires about meteoroids in the HF waveband with particular reference to the Perseids of the year 2002.
Meteoric traces by means of radio doppler
Theoretical article regarding the procedures to observe meteoric swarms by means of radio doppler. The HF waveband is used.
Meteoroids in radio. Hear the echoes and research on meteoroids in ELF and VLF
Short text useful to understand our projects. It is a sort of presentation of our group and it is also written on the site of IARA (Italian Amateur Radio Astronomy Group).
Meteors in the VLF waveband
A Powerpoint report presented at the First National Meeting of Amatorial Radioastronomy, where you can find many scientific experiments and their results.
Meteoric swarms of cometary origin analized using radar and visual techniques
Physics degree thesis regarding the study of the main charachteristics of three meteoric swarms: Lyrids, Eta-Aquarids and Orionids using a forward-scatter radar (BLM Radar) and the visual observation.
A new release of the world
A PowerPoint presentation about Radioastronomy that represents the differences between optical and radio astronomy. The history and the physical features of the radiowaves are also taken into consideration.
The amatorial Radioastronomer
Who is the amatorial radioastronomer? Does the amatorial radioastronomy make sense? What could we observe by using some simple instruments? The text takes into consisderation the many research fields and the correspondent difficulties we could have.
Meteoric swarms analized using radar techniques
The meteors are only the visual manifestation of one extremely immense category of objects: the meteoroidi. To know such bodies means to succeed to better comprise the mechanisms that regulate the life and the existence of our same planetary system.Currently, the acquaintance of the characteristics and dynamics of the interplanetary matter is particularly useful in order to above all avoid the risk of potentially harmful impacts against the satellites and the International Station Spaces.There are various techniques in order to study this phenomenon, but it is that radar that offers the best ones turns out to you. They will come defined the main characteristics of some meteoric swarms through the use of a bistatic meteoric radar (BLM radar), of the techniques of surveying and analysis of the phenomenon. There will be a comparison with the techniques and the characteristics that this study introduces in visual within. They will come moreover introduces the results of a search carried out at the CNR of Bologna.
The potentialities of the World Wide Web in the study of the meteoric phenomenon
The advent of Internet has sure given to an important impulse to amatorial radio astronomy. Between several fields of search, particular importance is the study of the meteoric activity. It is easy possible to reperire given observed to you coming from observatories pertaining to every continent. This allows to study the meteoric activity and in particular the maximums of activity of the swarms with much precision. This type of search introduces difficulties: the data do not come collected in a standard format, the acquisition techniques are various (meteor scatter, radar, etc.), it does not know the functions of observability of several receptive apparatuses, it must be worked with very many datas, the times of analysis are long. However, the results appear very encouraging and they allow to show oneself to the professional search in how much the inquired field does not cover particular interest between the scientific community. They will come discussed these peculiarities and will come introduced the analysis of a search. Moreover there will be a comparison with the potentialities of Internet for the study of the same phenomenon in visual field.
A bistatic radar in band VHF for the monitoring of meteoric impacts in atmosphere
The present study has the scope to describe to the minimal characteristics of a bistatic radar (the emitter and the receiver is placed in various places) acted to find the meteoric impacts in atmosphere to a height of approximately 100 km from the land surface.¶ They are brought back, moreover, the measures carried out from the authors during the maximum of the Perseids swarm during 11/08/2004 from the hours 22:20 to the hours 23:20 UT.
Analysis in multiband of the meteoric swarm of the Lyrids
The Lyrids meteor stream has a medium activity and its origin is cometary. Their parent body is the comet Thatcher, that passed the last time near Earth in 1861. The stream occurs in the last days of April and the maximum of activity occurs in the days from 21 to 23 April. The Lyrids were studied from 1994 to 2004 using two different techniques: visual and radio observation. The visual data were taken from the internet archive of International Meteor Organization. The analysis’s procedure follows in part the indication of this Organization. The radio data were obtained using the meteor scatter techniques. The data were taken from the Radio Meteor Observation Bullettins. The purpose of this analysis is the definition of main characteristics of the stream. The solar longitude of the maximum of the activity is ?0 = 32.2° ± 0.2° from radio data and ?0 = 32.2° ± 0.1° from visual data. The ZHR during the maximum is 25 ± 3 and medium ZHR is 13 ± 1. The data show the evidence of a complexity in the structure of the spatial distribution of matter and no evidence of periodicities in the activity.
