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Wide-Latitude Substorm Study - September 15-17, 1999

Experiment Overview

Post-Event Analysis

Millstone Hill WLS99 Observations

Diagnostic Data

Campaigns: SPARC, S-RAMP

Realtime Data

John Foster's Homepage

WLS 99: Hot News

A second magnetic cloud arrived 09/15/99 increasing Kp to 7.
SAID and steep equatorward wall of ionospheric trough moved over MHR at 03UT 14Sep99..
Solar and geophysical activity are increasing as we begin the week of the WLS ISR World Day experiment. Daily Ap was 38 on 09/13/1999.
Ap index leading up to WLS99 campaign interval

The Wide-Latitude Substorm Study has been organized by the NSF/UAF community as a research interval directed towards providing distributed observations of ionospheric parameters and electrodynamics through coordinated incoherent scatter radar (ISR) observations during active conditions. Solar active conditions have been experienced during the past week. This is the third consecutive appearance of this active region, with ~27-day recurrence period.
This confirms and reinforces the selection of 15-17 Sep 99 as the final dates for the core of the WLS99 ISr World Day experiments which will also support SPARC and the S=RAMP Space Weather month activities.
Average Ap index has exceeded 25 for the August activity and is building in intensity as equinox conditions approach.
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The Sept 1999 ISR World Day is a floating three-day (3 DAY) experiment which will be run during active conditions during the interval Sept 6-24, 1999.
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Post-Event Analysis

WLS 99 involves the global array of incoherent scatter radar facilities operating as a part of the ISR World Day program. Links to the radar facilities are found through the interactive map of incoherent scatter radar stations
As segments of the the data are examined in detail, preliminary descriptions of events of interest will be posted in the following list:

SAID moved into field of view of Millstone on 09/13/99.
SAID persisted for > 6 hr.
Magnitude of SAID decreased and reintensified 4 hours later
pre-midnight N-S velocity with ACE Bz on Sep 16-17 UT.
Sondrestrom ISR resolved velocities Sep 14
Sondrestrom ISR resolved velocities Sep 15
Sondrestrom ISR resolved velocities Sep 16
ACE and Sondrestrom at substorm onset on 09/16/99

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Millstone Radar WLS99 Observations

Millstone Hill az & el scan velocity & density for WLS interval
Millstone Hill azimuth scan Density Sep 14-15
Millstone Hill 9-position scan Velocity Sep 14 around SAID
Millstone Hill 9-position scan Density Sep 14 around SAID
Millstone Hill zenith profiles Sep 13-14
Sudden N-S movement of sharp trough boundary during SAID
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Representative Diagnostic Data

Ap Index for interval leading up to WLS99 campaign
Sept 1999 Dst Index
ACE SW/IMF parameters Sep 11-14, 1999
ACE SW/IMF parameters Sep 4-10, 1999

Sept 13-14, 1999

NOAA sat environment plot Sep 14
Magnetogram Ft CHurchill
Magnetogram Island Lake
Magnetogram Sodankyla Sep 14
ACE SW/IMF

Sept 14-15, 1999

NOAA sat environment plot Sep 15
Magnetogram Eskimo Point
Magnetogram Ft CHurchill
Magnetogram Island Lake
Magnetogram Sodankyla Sep 15
ACE SW/IMF

Sept 15-16, 1999

NOAA sat environment plot Sep 16
Magnetogram Eskimo Point
Magnetogram Ft CHurchill
Magnetogram Island Lake
Magnetogram Sodankyla Sep 16
ACE SW/IMF

Sept 16-17, 1999

NOAA sat environment plot Sep 17
Magnetogram Ft Churchill
Magnetogram Island Lake
Magnetogram Sodankyla Sep 16
ACE SW/IMF Sep 15-17, 1999

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SPARC / S-RAMP Space Weather Month

WLS 99 will coincide with an extensive SPARC scientific collaboratory. More details on the SPARC plans and preparations are available from Rick Niciejewski at U. Michigan (niciejew@engin.umich.edu) or through the SPARC homepage.
S-RAMP International Space Weather Month.
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Real-Time Data Plots

Realtime data for the WLS99 experiment are being organized and displayed through the UARC pages and through standard connections at a number of the instrument data servers. The Millstone Hill Madrigal database features Realtime Data from MHO Radar.