Victor Herrero Radio Astronomy Blog: August 2011

Tuesday, August 30, 2011

Io-D predictions with Radio-Jupiter Pro 3

http://radiosky.com/
http://www.radiosky.com/rjpro3ishere.html
http://www.radiosky.com/rjp3/rjpro3.exe

I thank Jim Sky for help with this Post.

I refer to:
Physics of the Jovian Magnetosphere, Edited by A.J. Dessler, 1983:
http://adsabs.harvard.edu/abs/1983phjm.book.....D
This Monograph is available in part at this location:
Google Books: "Physics of the Jovian Magnetosphere"

Table 7.4, page 255, in Chapter 7: "Phenomenology of magnetospheric radio emission" by Carr Desch and Alexander, contains the Io-D region definition used in Radio-Jupiter Pro 3:

The prediction is done by using a "mode file" that defines the parameters for the Io-D region. In Radio-Jupiter Pro 3, click on File and you will see options to load and edit the mode files. The default mode file is the University of Florida Radio Observatory file, but there is another file with Io-D parameters. Below are the mode parameters for the UF_IoD.JMF file, located at:

http://radiosky.com/rjp3/UF_IoD.JMF

The file can be downloaded and saved in the Radio-Jupiter Pro 3 directory. Then the user can do a File / Load Mode File operation to make it active.

Here is an example of a prediction for August 25 2011, at Nice France :

Monday, August 29, 2011

Strong and interesting non-Io arcs, reaching 80 dB above background, at Nancay on 110829

Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W

UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf

My thanks to the Nancay Radio Astronomy Station of Paris Observatory

Friday, August 26, 2011

Nice 2 hour long Io-D arc with pure Left Circular Polarization - strong Solar activity - at Nancay on 110825

Io-D events are not seen frequently at Nancay.
This one did not reach 20 MHz, but came close.
I do not know of any Radio JOVE observations of Io-D.
I look forward to studying the first one, some day.
Io-D is located roughly left of Io-B in the CML/Io-phase map.
It is radiated by southern magnetic hemisphere Cyclotron Masers, seen along one side of the Masers radiation cones (same side as Io-B but opposite hemisphere).
For 12 earlier post about Io-D events please see:
http://herrero-radio-astronomy.blogspot.com/search?q=io-d

Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W

UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf

My thanks to the Nancay Radio Astronomy Station of Paris Observatory

http://satorchi.net/nancay/lofar/index.php

Tuesday, August 23, 2011

Two nice non-Io events and a Narrow band Io-B low pass event, on 1108-19-20-23

My thanks to the Nancay Radio Astronomy Station of Paris Observatory
http://satorchi.net/nancay/index.php

Monday, August 22, 2011

Coordinated Observations of Io-B on 110821, remotely from Windward Community College Radio Observatory in Hawaii USA, while I was in Pincher Creek Alberta Canada

I obtained wonderful results during my remote observations, in the company of a total of about 8 Radio JOVE Observers, including myself (considering the whole Conference that lasted almost 2 hours for me).

I connected via Gmail Voice Video instead of my usual Skype (free call for me).

A great success, many thanks to Dr. James Thieman, Goddard Space Flight Center, for organizing this great event !

The graphics below were created in real time during the Conference, I show a sample of nice activity periods.

Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W

UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf

Thursday, August 18, 2011

Radio JOVE Coordinated Observing Telecon followup: non-Io arcs just before the Conference 110814

Many thanks to the tireless STEREO WAVES Team

Links in a side widget

Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W

UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf

Tuesday, August 16, 2011

MeerKATT - a World Class Radio Telescope in the Karoo

http://en.wikipedia.org/wiki/MeerKAT

The Square Kilometer Array Africa Organization is making good progress in its bid to host the SKA in Africa:
http://www.ska.ac.za/download/clipping_en2_aug2011.pdf
http://www.ska.ac.za/

Monday, August 15, 2011

Io-A low pass and Io-C, at Nancay on 110815

Io-A is Right Circular Polarized but Io-C should be Left CP. This is based on Cyclotron Maser Theory. I do not know why this happens frequently, which makes it worth studying.

Azuma Imai Warwick Dulk Riddle
http://jupiter.kochi-ct.jp/
http://jupiter.kochi-ct.jp/jrm/jrm07.zip
http://adsabs.harvard.edu/abs/1975ojsr.book.....W

UAG Report 42 - 56 pages - 4 MB:
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/UAG-Reports/UAG-042.pdf

My thanks to the Nancay Radio Astronomy Station of Paris Observatory
http://satorchi.net/nancay/heather.php

Sunday, August 14, 2011

Io-B at AJ4CO Observatory on 110814

I thank Jim Thieman for organizing the Radio JOVE Coordinated Observing Telecon, and Dave Typinski for publishing his streamed two dipole array data.

The graphics below were generated in real time during the conference.

UT-7 Pacific time on this spectrum