ISR-based Model and Web Site Update History
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Feb 2006 |
ISRIM online! ISRIM (incoherent scatter radar ionospheric model) is an
integrated version for all local and regional models. Different from other
models on this site, ISRIM is a fully analytic model. It uses B-spline
(or polynomial) and harmonic functions to represent coefficients generated
from binning procedures. An ISRIM logo was designed. The introduction.html
is revised.
|
Jan 2006 |
Millstone Hill local model is updated. The update is performed by
applying more strict data quality controls on Ne data, as it was noticed
that some bad data (or not well calibriated data) were included in the
earlier version. Deviations (D) between the data and the earlier version
of model are first determined. Bad data are then identified according to
the magnitude of the deviation. If D for Nel is > .75, for instant, then
the datum is to be rejected. Also for a given monthly bin, 3 month of data
centering at the given month is used (the earlier version used only one
month of data).
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Nov 2005 |
New interface of the model menual list. GRL paper on all ISR local
models was published.
Zhang, S.-R., J. M. Holt, A. P. van Eyken, M. McCready, C.
Amory-Mazaudier, S. Fukao, and M. Sulzer (2005), Ionospheric local model
and climatology from long-term databases of multiple incoherent scatter
radars, Geophys. Res. Lett., 32, L20102, doi:10.1029/2005GL023603
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May 2005 |
Model website has been moved to the new MADRIGAL server.
|
April 2005 |
All local models have been revised in the altitude
variation. Cubic B-spline is used to represent the variation. The
B-spline is contrained at the upper boundary of the models so that
2nd and 3rd deriatives of the altitude variation are zero, i.e.,
variations at the boundary are linear. During the height profile fitting,
we use data at two 1/4 points between two nodes of the original data.
This might give better represention of the gradient at the original nodes.
The break points for the B-spline are 100, 125, 150, 190, 230,
275, 350, 450, 600
km for Arecibo, St. Santin, Sondrestrom, Tromso and Svalbard,
100, 125, 150, 190, 230, 275, 350, 450, 550, 650, 850, and 1000 km for
Millstone Hill, and 200, 250, 300, 350, 400, 450, 500, 550, and 600 km
for Shigaraki.
|
April 2005 |
Total Electron Content (TEC) is now provided by the
Millstone Hill Regional Model. TEC is calculated between 200-600 km. The
VMHR shows TEC, and the interactive web page has also an option to
calculate TEC.
|
April 2005 |
Virtual Millstone Hill Radar now provides the current day
plots (in polar coordinates) vs latitude and local time for 350 km. The similar
plots are used also in the model interactive page.
|
April 2005 |
Mill Hill Regional Model is updated. We use results
obtained in April 2002 from the bin-fit program to generate analytical
4-D models, where seasonal (day number), local time, altitude and
latitude (geodetic 35-55 degress) variations are considered. To represent
these variations, harmonic functions with annual and semiannual components
for the seasonal variation, harmonic functions with diurnal, semidiurnal
and terdiurnal components for the local time variation, cublic B-spline
function for the height variation, and cublic polymonial function are used.
|
March 2005 |
Millstone Hill Local Model recovery programs are available for
download.
|
Jan 2005 |
New papers and posters are added to Related
Papers
|
November 2004 |
New Millstoen Hill and Sondrestrom high latitude convection model is
now online, replacing a prior version of convection model with only
Millstone Hill radar considered. |
Sep-Oct 2004 |
New ISR models and virtual radars are available for
Svalbard, Tromso, Sondrestrome.
|
July 2004 |
Arecibo ISR Model is online! Click
http://www.haystack.edu/madrigal/Models/ARisrm_form.html
to run interactive computations and plot outputs, and click
http://www.haystack.edu/madrigal/varr/ to see Virtual Arecibo Radar.
|
May 2004 |
a new link to Virtual ISRs and Relatime Ionosphere is available.
see
here.
|
May 2004 |
Realtime predication of high latitude potential patterns available
now by using near-realtime IMF data from ACE Satellite Magnetometer
measurements. see here.
|
May 2004 |
New Millstone Hill Convection Model availabe. Click
here
for the model interface and also
here
for a description.
|
April 2004 | Calculators for St Santin model
and
MU radar model are implemented. see the new version of the model interface for St Santin and
MU
radars.
|
April 2004 | MU Radar Ionospheric Model is available. see
the deatils.
|
March 2004 | A calculator for a
given input sets is now available. see
the
model
interface
|
August 2003 | MU Radar HWM-like Wind Model (HWMMU) online
version available. Thanks to Prof. Oliver of Bostone University who
provided the FORTRAN code.
|
August 2003 | MU Radar Ion Drift Model (MUIDM) online version
available.
|
July 2003 | Online computations of St. Santin radar model.
|
July 2003 | Virtual St. Santin Radar
|
June-August 2003 | REU student project on St Santin radar
data modeling
|
December 2002 | Latest local model version 1.1 is available.
Full description of the model is here.
Model outputs are plotted with MATLAB. New AGU posters are added to the
" Related
Papers" section.
A link to view
MH historical data plots is added.
|
October 2002 | Virtual Millstone Hill Radar:
current ionospheric conditions over Millstone Hill
|
June 2002 | Model movies available
|
April 2002 | Regional model updated to exclude some suspect
data
|
March 2002 | Local model updated to include more data and to
exclude suspect data. There are now 14 height bins.
|
January 2002 | Low thermosphere model included
|
December 2001 | First-principles model included
|
November 2001 | Local & Regional model established
|
November 2001 | Model Webpage created
|
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