Welcome to Uppsala! Thursday May 18 13:00, room Å4003 15:00 Coffee (17:30 Dinner) Friday May 19 09:00, room Å4003 10:00 Coffee splinters (other locations)

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Presentation transcript:

Welcome to Uppsala! Thursday May 18 13:00, room Å :00 Coffee (17:30 Dinner) Friday May 19 09:00, room Å :00 Coffee splinters (other locations) 11:30 Lunch 13:00 Room Å4003 splinters (other locations) 15:30 end meeting Mats André

Draft Agenda May 18 Welcome, Cluster and EFW basics and status (MA) EFW modes and operations (AIE) EFW internal burst mode statistics (NE) EFW SC 1 and 3 operations (AIE, YK) Cluster data sets: CDs, DDS, CSDS, CAA (PAL) The CAA: where we are and where we are going (HL) Data exchange (beyond standard archives) (AV, SB) Coffee CAA data production (YK) Revised look at plasma densities from Cluster SC potential (AP) Polar wind measurements from wake studies (AIE) ISADT analysis software (AIE, YK. RG) Publications and future meetings (MA) AOB

Cluster Mission Overview Launch: summer 2000 Nominal mission: 2001 and 2002 (50%) Extension 1: 2002 to 2005 (100%) Extension 2: 2005 to 2009 (100%) All spacecraft fully operational

Separation distance strategy C1C1 C2C2 C3C3 C4C4 d C1,C2,C3 C3,C4 cusp tail

Tail 2005

Cluster Instrument Status Most instruments are operational Not operational ASPOC C1 (presently no ASPOC running) CIS C2 EDI C4

=> operations => EFW for Dummies EFW Electric Field and Wave

Common EFW Modes Normal Mode Telemetry (full orbit) 2 E-field signals, 25 samples/s 4 single probe signals, 5 samples/s Burst Mode 1 Telemetry (hour) 2 E-field signals, 450 samples/s 4 single probe signals, 5 samples/s Internal EFW burst (around 10 s) 4 single probe signals, few 1000 samples/s

EFW operational on all four SC SC 1 Problem probe 1, , somewhat reduced science data. SC 2 Filter problem, Solution: use 180 Hz filter also in NM (25 samples/s) on all probes. SC 3 Problem probe 1, , somewhat reduced science data. SC 4 OK

SC 1, probe 1 and SC 3, probe 1 First workaround: use only probe pair 3+4 EFW prime parameters (4s) OK Reprogrammed to use 3 probes to get 2 orthogonal E (routine operations from late September 2003) From January 2006: In NM, use only probe pair 3+4 for E use probe 2 to get SC potential at 25 samples/s

SC spin axis tilt WHISPER proposal

Tilt is feasible Thermal main constraint Decide later Duration a few weeks 45 degrees? Apil 2007? SC spin axis tilt

EFW webpage