Millstone Hill ISR, Millstone Hill ISR, June 14-18, 2004June 14-18, 2004

Ti, June 14-18, 2004Ti, June 14-18, 2004

Ti and wind pattern, Ti and wind pattern, March 29 - April 3, 2004March 29 - April 3, 2004

Zonal wind, m/s

Meridional wind, m/s

Ti, K

Ti on March 30, 2004Ti on March 30, 2004

Variations in Ti on March 30, 2004 reach ~100-200 K

Millstone Hill Ti empirical model does not reveal large variations for this level of solar activity and season

LTCS 2005 suggestionsLTCS 2005 suggestions

Two 4-5 day campaigns close to the Two 4-5 day campaigns close to the periods of LTCS 2004 campaigns (June, periods of LTCS 2004 campaigns (June, November)November)

Objectives:Objectives:• To establish state of the lower thermospheric To establish state of the lower thermospheric

parameters under conditions of minimal parameters under conditions of minimal disturbances (low solar flux, low geomagnetic disturbances (low solar flux, low geomagnetic activity)activity)

• To study day-to-day variability in winds and To study day-to-day variability in winds and temperature at MLT altitudestemperature at MLT altitudes

• To examine possible dependence of tidal To examine possible dependence of tidal signatures on solar fluxsignatures on solar flux

When possible, include E-region coverage When possible, include E-region coverage in other World Day campaignsin other World Day campaigns

Long-duration MLT observation Long-duration MLT observation campaigncampaign

Objective 1:Objective 1: to study atmospheric waves and to study atmospheric waves and variability in the MLT from small scale to global variability in the MLT from small scale to global scale scale

Objective 2Objective 2: to study day-to-day variability at F-: to study day-to-day variability at F-region altitudesregion altitudes

DataData::• E-region: Vn, Un, Ti, NeE-region: Vn, Un, Ti, Ne• F-region: Ne, Te, Ti, electric field, merid. wind F-region: Ne, Te, Ti, electric field, merid. wind

Suggested campaign periodSuggested campaign period: : August 1-30, 2005August 1-30, 2005 Cooperation with satellites (TIMED) and world-Cooperation with satellites (TIMED) and world-

wide ground-based observations is expected for wide ground-based observations is expected for global coverage of data.global coverage of data.