Victor Herrero Radio Astronomy Blog

X1.7 flare followed by complex radio event with types III, II, and IV radiation on 120127

2012-01-29T11:02:00.000-07:00

Many thanks to the Solar Dynamics and STEREO WAVES Observatory Teams, and Lockheed Martin Solar Laboratory

50 years of the European Southern Observatory

2012-01-29T10:53:00.001-07:00

M8.7 flare followed by types III and II radiation, on 120123

2012-01-24T20:32:00.000-07:00

Many thanks to Lockheed Martin Solar Laboratory and the STEREO WAVES Team

Detecting thermal radio emission from solar type stars has become possible

2012-01-24T20:07:00.001-07:00

Lively Solar activity at Solar Dynamics and Paris Observatories on 120119: C3.2 flare in Active Region 11396, followed by type III and type II (with fundamental and second harmonic), broad bands of metric continuum, and M2.6 flare in Active Region 11402

2012-01-19T13:30:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, the Solar Dynamics Observatory, and Lockheed Martin Solar Laboratory

Radio Luminosities of Stars - Stephen White - University of Maryland

2012-01-18T13:42:00.000-07:00

C2.4 flare followed by type III and type II (fundamental and second harmonic), at STEREO WAVES on 120102

2012-01-09T11:59:00.000-07:00

Many thanks to the STEREO WAVES Team and NOAA Space Weather Prediction Center

EVLA - A new Era in Stellar Radio Astronomy - Gregg Hallinan 2011

2012-01-09T11:51:00.000-07:00

Io-D at STEREO WAVES on 111230

2012-01-08T08:27:00.000-07:00

Many thanks to the STEREO WAVES Team, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Probing Stellar and Substellar Magnetospheres - Gregg Hallinan 2011

2012-01-08T08:19:00.000-07:00

Solar types IV and III radio events at Paris Observatory on 111224 111226 111230

2012-01-01T03:20:00.001-07:00

111224

111226

111230

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

Towards Global Real Time e-VLBI

2011-12-28T03:28:00.000-07:00

Beautiful Io-B at Paris Observatory Nancay Station on 111226

2011-12-27T03:00:00.000-07:00

Best wishes for 2012

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Flipcard view of recent posts

2011-12-20T03:07:00.000-07:00

Io-B at the Franziskaner Gymnasium in Grosskrotzenburg Germany, and Observatoire de Paris, in Nancay France, on 111219

2011-12-19T17:55:00.000-07:00

Many thanks to Brother Bernardin and His Astronomy Students, for streaming the Radio-SkyPipe data from their FGKRO Radio JOVE Observatory

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Solar Cycle Progression

2011-12-18T03:25:00.000-07:00

Non-Io-A at Nancay on 111217

2011-12-17T18:48:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Emission and propagation of Saturn kilometric radiation - Lamy et al. 2011 - Fig. 8

2011-12-17T05:00:00.000-07:00

Many type III events with B 5-9 X-ray flux levels, at Nancay on 111211

2011-12-11T12:43:00.001-07:00

Left Circular Polarization

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

Emission and propagation of Saturn kilometric radiation

2011-12-11T12:30:00.000-07:00

Four hours of non-Io activity, at Nancay on 111208

2011-12-09T17:34:00.001-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

Active tripole antenna model for a Moon based observatory

2011-12-09T17:00:00.000-07:00

Interesting non-Io-C, at Nancay on 111206

2011-12-07T02:34:00.001-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Tilts of planetary magnetic fields with respect to their rotation axes - Bagenal and Bartlett - University of Colorado

2011-12-07T02:00:00.000-07:00

Beautiful Io-B preceded and followed by non-Io, at Nancay on 111117-111118

2011-11-23T17:49:00.001-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Alma Radio Telescope Array in Chile

2011-11-21T17:58:00.000-07:00

Type II and III Solar activity at Nancay on 111114-111115

2011-11-16T12:18:00.001-07:00

111114 below

111115 below

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

Installation of optical fibers at the Westerbork Radio Telescope in The Netherlands

2011-11-12T02:34:00.000-07:00

Nice Io-A at Nancay on 111109

2011-11-10T03:52:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Size of Jupiter's magnetoshpere in the sky

2011-11-09T13:00:00.000-07:00

M1.1 flare followed by type III and II radiation, at Nancay on 111109

2011-11-09T12:49:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

ALMA and the beauty of the Southern Sky in Chile

2011-11-07T18:55:00.002-07:00

Type III and II Solar activity at STEREO WAVES on 111103

2011-11-06T01:32:00.000-07:00

Many thanks to the STEREO WAVES Team

Searching for pulsars with the Lofar Array

2011-11-05T14:30:00.000-07:00

Io-D followed by non-Io, at Nancay on 111103-111104

2011-11-05T14:09:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Earth and Jupiter Magnetosphere Comparison - Fran Bagenal and Steve Bartlett - University of Colorado

2011-11-05T13:50:00.000-07:00

http://lasp.colorado.edu/mop/

Io-A followed by non-Io-C, at Nancay on 111102

2011-11-05T13:40:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

ALMA - Science verification observations

2011-11-05T13:00:00.000-07:00

Io-B with Narrow radiation, at Nancay on 111101

2011-11-02T11:42:00.000-07:00

Other posts about N events:
http://herrero-radio-astronomy.blogspot.com/search/label/type%20N

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

First fringes on the Kunming Radio Telescope

2011-10-27T03:15:00.000-07:00

Interesting non-Io-A, at Nancay on 111025-111026

2011-10-26T02:13:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Juno Observatory Instrumentation - On its way to Jupiter, arriving in 2016

2011-10-23T13:00:00.000-07:00

Non-Io-B followed by Io-A, at Nancay on 111023

2011-10-23T05:16:00.000-07:00

Non-Io-B below

Io-A below

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

EVLA Publications - Progenitors of Type Ia Supernovae

2011-10-22T07:00:00.000-07:00

M1.3 flare followed by types V, II, and IV, at Nancay on 111021

2011-10-22T06:35:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory

Io-B on 111018 followed by non-Io on 111018-111019, at Nancay

2011-10-19T16:19:00.000-07:00

Below 3 illustrative Io-B dynamic spectra

Below 3 illustrative non-Io dynamic spectra

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

Jovian and Solar activity at Nancay on 111017

2011-10-17T12:38:00.000-07:00

Io-B

Below some significant type III Solar events

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan

The Big Bear Solar Observatory New Solar Telescope - One of the two largest aperture Solar telescopes in the world

2011-10-15T06:19:00.003-07:00

The Big Bear Solar Observatory is operated by the New Jersey Science and Technology University (NJIT - New Jersey Institute of Technology):
http://www.bbso.njit.edu/

My many thanks to Claude Plymate for showing me this wonderful instrument.

I refer to Cao et al. 2010:
http://solar.njit.edu/preprints/cao1454.pdf
for a description of the Scientific Instrumentation

Additional papers at:
http://www.bbso.njit.edu/nst_instr.html

Image Gallery:
http://www.bbso.njit.edu/nst_gallery.html
AR NOAA 11109 observed with the NST/TiO imager on Sept 27, 2011
http://www.bbso.njit.edu/gallery/nst_tio_20100927_172539.jpg

click images for full size view

1.6 meter primary mirror backside, with support cell mechanical actuators partially visible.

The Telescope is an off-axis Gregorian Instrument

Power dispersing assembly at the primary focus
Movable counter weight with motor in the tube to the right
Polarizers
Second of a series of mirrors steering the light beam to the adaptive optics bench in the lower floor

Adaptive optics bench of the Shack-Hartmann system

The adaptive mirror currently has 97 actuators

About half of the control room displays

Adaptive optics graphics display

Adaptive optics digital display

H alpha Observer Tool

New Solar Telescope Main graphical Interface

Non-Io-B followed by non-Io-A, at Nancay on 111011-111012

2011-10-13T07:10:00.000-07:00

Many thanks to the Nancay Decametric Array Team at the Nancay Radio Astronomy Station of Paris Observatory, and Professor Imai Laboratory at Kochi National College of Technology in Japan.

Solar Stereoscopy and Tomography - Markus J. Aschwanden - 2011

2011-10-11T07:56:00.000-07:00

I refer to Aschwanden 2011:
http://solarphysics.livingreviews.org/Articles/lrsp-2011-5/

This is an extremely interesting review paper, 96 pages (19 pages of references) with stunning color graphics. I reproduce 3 figures below, to get your attention !

Dr. Aschwanden is with the Lockheed Martin Solar and Astrophysics Laboratory in Palo Alto California.

Video about the Arizona Near Space Research Balloon Flight 64 (KA7NSR-13) - on October 8 2011

2011-10-09T13:35:00.000-07:00

Many thanks to Prof. David Iadevaia, Pima College, Tucson Arizona:
http://www.davidiadevaia.com/

See also:
http://herrero-radio-astronomy.blogspot.com/2011/10/arizona-near-space-research-balloon.html

Beautiful Io-A followed by weak non-Io-C, at Nancay on 111009

2011-10-09T09:35:00.000-07:00

Many thanks to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Arizona Near Space Research Balloon Flight 64 (KA7NSR-13) - on October 8 2011

2011-10-08T12:03:00.000-07:00

Many thanks for the live video stream provided by David Iadevaia:
http://www.davidiadevaia.com/livevideo.html
see also:
http://ansr.org/
http://groups.yahoo.com/group/Ballooning/
http://www.ansr.org/flightinfo.html

Jovian arcs at STEREO WAVES: Non-Io-C and Io-C on 111003

2011-10-08T09:32:00.000-07:00

The Jovian probability map above is based on Terrestrial observations from the University of Colorado in the 1970s and not accurate for STEREO WAVES observations. It provides some guidance in SWAVES data analysis.

Many thanks to the STEREO WAVES Team and Kochi National College of Technology in Japan

Non-Io-A at Nancay on 111006-111007

2011-10-07T11:20:00.001-07:00

Many thanks to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Determination of a Correlation of Sunspot Number and 20.1 MHz Solar Radio Bursts

2011-10-05T11:11:00.000-07:00

I refer to Burleson 2011:
http://www.jurp.org/2011/MS120.pdf
http://www.jurp.org/

This is a wonderful undergraduate study, and I recommend it.

Solar types II and III and Jovian Io-A arcs, at Nancay on 111001-111002

2011-10-04T15:55:00.000-07:00

Many thanks to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Beautiful 4 hour long Io-D followed by non-Io-B, at Nancay on 111003

2011-10-03T12:02:00.000-07:00

My thanks to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Type II with fundamental and second harmonic, following type III bursts, at Nancay on 110929

2011-10-02T14:24:00.000-07:00

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory

The Mullard Radio Astronomy Observatory in Cambridge United Kingdom - images by Christian Monstein

2011-09-29T12:41:00.000-07:00

Photography taken September 2011.

Christian designed and directs the e-Callisto International Network of Solar Radio Spectrometers, from the Eidgenössische Technische Hochschule in Zürich:
http://en.wikipedia.org/wiki/ETH_Zurich

Please see the e-Callisto network page for more details:
http://e-callisto.org/

Christian will give an e-Callisto workshop in Pune India next November:
http://rac.ncra.tifr.res.in/SRWS2011.html

please click images for enlargements

Two 13 meter dishes, part of the Ryle Telescope:
http://www.mrao.cam.ac.uk/telescopes/ryle/index.html

The Arcminute Microkelvin Imager
http://www.mrao.cam.ac.uk/telescopes/ami/

The remains of the array with which Jocelyn Bell Burnell and Anthony Hewish discovered pulsars in 1967

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

The central dish of the historic One-Mile Telescope:
http://en.wikipedia.org/wiki/One-Mile_Telescope

Non-Io-A followed by non-Io-C, at Nancay on 110929

2011-09-29T10:50:00.000-07:00

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Visu_routine plots: B-W linear - Bottom stretch 20 - Top stretch 45 - Gamma 1.0

Io-A high pass followed by non-Io-C, at Nancay on 110924 - 110925

2011-09-28T19:33:00.000-07:00

My many thanks to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Visu_routine plots: B-W linear - Bottom stretch 20 - Top stretch 45 - Gamma 1.0

Io-B low pass with interesting double Narrow band radiation, followed by non-Io-A, at Nancay on 110924

2011-09-28T08:42:00.000-07:00

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Visu_routine plots:
B-W linear - Bottom stretch 25 - Top stretch 40 - Gamma 1.0

Non-Io A and C event, lasting more than 3 hours, at Nancay on 110927

2011-09-27T13:10:00.000-07:00

My thanks to the Nancay Radio Astronomy Station of Paris Observatory.

Visualization (visu_routine) settings:
RAINBOW and B-W linear
Bottom stretch 23 - Top stretch 42 - Gamma 1.0

Selected Solar radio events at STEREO WAVES and Nancay 110910 to 110924

2011-09-26T07:51:00.001-07:00

My thanks to the STEREO WAVES Team and the Nancay Radio Astronomy Station of Paris Observatory.

Non-Io-A at Nancay on 110922

2011-09-23T09:14:00.000-07:00

I express my thanks to Laurent Denis and Andree Coffre, Nancay Radio Astronomy Station of Paris Observatory, for their help with the Visualization Software I have started to use in this post.

My gratitude to the Kochi National College of Technology in Japan

LOFAR Station at Onsala Space Observatory in Sweden

2011-09-21T16:45:00.001-07:00

The Swedish Minister for Education and Research, Jan Björklund, will inaugurate Onsala Space Observatory’s LOFAR Station on September 26

http://lofar-se.org/

Low frequency antenna model - image by Robert Cumming

25 meter telescope - image by Roger Hammargren

20 meter telescope - image by Jan Olof Yxell

For other LOFAR posts see:
http://herrero-radio-astronomy.blogspot.com/search/label/LOFAR%20%20LWA

Io-B with Narrow radiation followed by non-Io-A on 110916-110917

2011-09-18T08:13:00.000-07:00

CQ QST http://herrero-radio-astronomy.blogspot.com/ QRA N7YBV 73

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan
http://satorchi.net/nancay/rh/index.php

As predicted by Jim Sky's RJP3: Io-C on 110915-110916

2011-09-16T09:40:00.000-07:00

My gratitude to the Nancay Radio Astronomy Station of Paris Observatory and Kochi National College of Technology in Japan

Solar type III storm of 110905-110906 observed by STEREO WAVES A

2011-09-14T12:33:00.000-07:00

Interesting Io-A 110914, observed with 72 conical spirals (for each polarization), using the Nancay Radio Astronomy Station Decametric Array real time data stream

2011-09-14T07:41:00.000-07:00

My thanks to the Nancay Radio Astronomy Station of Paris Observatory

http://www.obs-nancay.fr/dam/realtime_display/dam_realtime_schedule.php?lang=en
http://www.obs-nancay.fr/dam/realtime_display/dam_realtime.php?lang=en

Type II burst at Culgoora, with fundamental and second harmonic, on 110906

2011-09-11T15:51:00.000-07:00

My thanks to Culgoora Observatory
http://www.ips.gov.au/Solar/2/2

Borrero and Ichimoto 2011: Magnetic Structure of Sunspots

2011-09-11T14:49:00.001-07:00

http://solarphysics.livingreviews.org/Articles/lrsp-2011-4/

Beautiful Io-B followed by non-Io-A, at Nancay on 110910

2011-09-10T07:59:00.000-07:00

http://www.obs-nancay.fr/index.php/la-station/presentation

Nice Io-A at Nancay on 110907

2011-09-07T10:56:00.000-07:00

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

Sunspot Modeling: From Simplified Models to Radiative MHD Simulations

2011-09-07T08:10:00.002-07:00

Please see:
Rempel and Schlichenmaier 2011 (60 pages):
http://solarphysics.livingreviews.org/Articles/lrsp-2011-3/
and references in it (17 pages):
http://solarphysics.livingreviews.org/Articles/lrsp-2011-3/refs.html
Movie Archive (118 MB):
http://solarphysics.livingreviews.org/Articles/lrsp-2011-3/download/lrsp-2011-3Movies.tar.gz

This is a thorough review of the subject, with numerous references and beautiful movies.

Wonderful !!
Many thanks to the Authors.

ExPRES - exoplanetary and planetary radio emission simulator

2011-09-06T10:30:00.000-07:00

I refer to:
Hess Petin Zarka Bonfond Cecconi 2010:
http://adsabs.harvard.edu/abs/2010P%26SS...58.1188H
and its references:
http://adsabs.harvard.edu/cgi-bin/nph-ref_query?bibcode=2010P%26SS...58.1188H&refs=REFERENCES&db_key=AST

This publication describes the use of the ExPRES code to model Jovian radiation arcs. The program computes the power of the radio emission generated by the Cyclotron Maser Instability for specified electron velocities and angular parameters.
The computations are performed at several frequencies and times, to generate a theoretical dynamic spectrum that is compared to observations.
The multipole VIP4 magnetic field model (Connerney et al. 1998) is used.

Figure 3a. Sketch of the observation geometry. The delta lambda angle (lead angle) is a fundamental parameter in the fits.

As a first approximation, the times and frequencies are measured manually using Nancay Decametric Array data:
http://www.obs-nancay.fr/dam/data_dam_affiche/data_dam_affiche.php?init=1&lang=en

Using the initial approximation, the software finds the line of maximum spectral power and the arc width. For each arc, about 2000 runs of the code were executed with different values of electron velocity and lead angle. The quality of the model is determined by computing the correlation of the observations with the simulations:

Fig. 6. Correlation coefficients of the 1-bitmask of the Io-C arc observed on 7 August 1999 with the 1-bitmask of the corresponding arc simulated by the ExPRES code, as a function of the emitting electrons velocity and lead angle of the radio emitting field line. The highest correlation coefficients align on a diagonal due to the geometrical balance of the lead angle and the beaming angle.

32 Io-B and 20 Io-D arcs between 1991 and 2007 were the main events analyzed in this study:

Some conclusions:

The loss cone driven Cyclotron Maser Instability models the southern hemisphere arcs with high correlation coefficients. Northern hemisphere arcs are not well modeled. The VIP4 magnetic field model does not reach a high enough value in the northern hemisphere for good fits with ExPRES.

The main ultra violet auroral spots do not have radio arcs associated with them, as previously assumed !

In 6 spectra with multiple arcs, a regular decrease in the lead angle and electron velocity was measured.

The accuracy of the models will be improved with magnetic field models based on forthcoming Juno Observatory data.

----------------------

I have not reviewed many very interesting discussions and conclusions. Please study this wonderful paper !

Nice non-Io-A just below the Io-A region, on 110905

2011-09-05T09:08:00.000-07:00

My thanks to the Nancay Radio Astronomy Station of Paris Observatory

Lovely 2 hour long Io-A on 110831 - nice non-Io-B on 110902

2011-09-03T11:37:00.000-07:00

For other recent Io-A and non-Io events please see:
http://herrero-radio-astronomy.blogspot.com/search/label/Io-A
http://herrero-radio-astronomy.blogspot.com/search/label/non-Io

My thanks to the Nancay Radio Astronomy Station of Paris Observatory

Io-D predictions with Radio-Jupiter Pro 3

2011-08-30T13:23:00.000-07:00

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 :

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

2011-08-29T16:12:00.000-07:00

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

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

2011-08-26T11:02:00.001-07:00

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

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

2011-08-23T08:09:00.000-07:00

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

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

2011-08-22T11:26:00.001-07:00

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

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

2011-08-18T08:53:00.001-07:00

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

MeerKATT - a World Class Radio Telescope in the Karoo

2011-08-16T11:58:00.001-07:00

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/

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

2011-08-15T16:16:00.002-07:00

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

Io-B at AJ4CO Observatory on 110814

2011-08-14T06:11:00.003-07:00

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

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

Nice C6 occulted flare with eruption wave and radio emission on 110811

2011-08-12T07:25:00.003-07:00

Four frames from:
Lockheed Martin Solar Laboratory movie

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

X6.9 flare on 110809

2011-08-10T09:54:00.001-07:00

Eruptive X6.9, AR1263 , N17W71, Peak@ 08:05 9-August-2011

Three frames from:

Lockheed Martin Solar Laboratory movie

Radio spectra from the e-Callisto Network Archive:
http://e-callisto.org/
http://soleil.i4ds.ch/solarradio/callistoQuicklooks/?date=20110809

Beautiful Io-B at Nancay on 110809

2011-08-09T17:52:00.000-07:00

Detail from the Azuma/Imai/Warwick map

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

Nice Io-C at Nancay on 110808

2011-08-08T13:27:00.000-07:00

Comparable strength in Right and Left circular polarization, with different slopes

Weak ionospheric modulations in LCP

110804 radio event following M9.3 flare, at STEREO WAVES

2011-08-07T06:52:00.001-07:00

Proton flux from:

http://www.lmsal.com/solarsoft/latest_events/

Juno launch 110805

2011-08-06T11:37:00.000-07:00

M9.3 X-ray flare with radio emission on 110804

2011-08-04T11:32:00.001-07:00

Three frames from:

Lockheed Martin Solar Laboratory movie

Nancay spectra of Io-B 110802 at 150 ms per pixel

2011-08-03T18:18:00.000-07:00

I thank L. Denis and the Nancay Radio Astronomy Station of Paris Observatory for providing the images.

A set of 12 is available at
https://ftp.obs-nancay.fr/m8k3f1b/download
until August 13.

They display the period near:
110802 0215 UT during the initial phase of the Io-B
110802 0315 UT during the final phase of the event
in Right and Left polarizations.

See also:
http://herrero-radio-astronomy.blogspot.com/2011/08/beautiful-io-b-with-ionospheric.html

Detail showing Modulation Lanes

click images for a 1216 by 768 enlargement

e-Callisto at Reeve Observatory, in beautiful Anchorage Alaska

2011-08-02T08:13:00.000-07:00

I congratulate Whitham D. Reeve for the results he is obtaining with his e-Callisto system:
http://www.reeve.com/e-callisto.htm

e-Callisto is an instrument designed by Christian Monstein at ETH Zurich for Solar radio spectrometry in the 45 ~ 870 MHz frequency range.

Please see the e-Callisto network page for more details:
http://e-callisto.org/

Above is an example of the many interesting Solar spectra Whit shows at:
http://www.reeve.com/e-callistoSpectrograms.htm

The antenna and rotator system are described at:
http://www.reeve.com/e-callistoAntenna.htm

Receiver construction is explained at:
http://www.reeve.com/e-callistoReceiverConstruction.htm

Beautiful Io-B with ionospheric modulations, and non-Io-A, at Nancay on 110802

2011-08-02T06:03:00.002-07:00

Many thanks to Laurent Denis and the whole Decametric Array Team

http://www.obs-nancay.fr/index.php/instruments/reseau-decametrique#

Io-A on 110730; non-Io on 110731

2011-07-31T14:43:00.000-07:00

My thanks to Paris Observatory

M9.3 flare on 110730

2011-07-31T13:27:00.000-07:00

SDO AIA 171 angstrom, 2 frames from this: Lockheed Martin Solar Laboratory movie