1 / 8

The SECCHI Campaign

The SECCHI Campaign. Jean-Pierre Wuelser SECCHI Consortium Meeting Orsay. Outline. What is a SECCHI Campaign? The first SECCHI Campaign: May 2007 Campaign features and constraints Science objectives A possible campaign observing program Discussion Science focus Observational approach.

atira
Download Presentation

The SECCHI Campaign

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The SECCHI Campaign Jean-Pierre Wuelser SECCHI Consortium Meeting Orsay

  2. Outline • What is a SECCHI Campaign? • The first SECCHI Campaign: May 2007 • Campaign features and constraints • Science objectives • A possible campaign observing program • Discussion • Science focus • Observational approach

  3. What is a SECCHI Campaign? • SECCHI Campaigns are designated periods of time where • Each STEREO observatory receives two DSN downlinks per day • SECCHI receives twice the daily telemetry volume, i.e., approx. 9.3 Gbit/day/observatory instead of 4.65 • SECCHI gets a total of 4 weeks of campaign time during the primary science mission • SECCHI plans to have 2 campaigns of two weeks each • SECCHI Campaigns must be scheduled long in advance • The campaign dates cannot be adjusted based on solar activity

  4. The First SECCHI Campaign • The focus of the first SECCHI Campaign are observations at an observatory separation angle best suited for • Stereoscopic observations in the classical sense • 3D reconstruction using tie point methods with visual interaction • Primary science objective: Investigate CME initiation in the low corona • The first SECCHI Campaign: • Starts on May 4 and ends on May 17 • Observatory separation: approx. 7 degrees • Ends just before the beginning of the SOHO keyhole period • Unfortunately during the Hinode eclipse season • May impact the availability of data from the optical telescope in particular

  5. Campaign features and constraints • SECCHI will be able to downlink twice the data volume of the regular synoptic program • Data rate implications: • Average SECCHI data rate during campaign: 108 kbit/sec • Peak transfer rate SECCHI to SSR: 153 kbit/sec • SECCHI will be able to downlink almost as much data as it could possibly transfer to the Solid State Recorder • There is not much point in using the circular event buffer during the SECCHI Campaign • Continuous high cadence observations, no burst mode • During the campaign, the data rate to the SSR will be similar, or slightly lower as in the case of a synoptic + event buffer observing program

  6. Science Objectives • Primary objective: investigate initiation of CMEs in the low corona • Analyze magnetic topology in the low corona during CME initiation with EUVI stereoscopic imaging at high cadence • Observe initial acceleration of CMEs and associated phenomena in the 1-2 solar radii range • Investigate broad range of other transient phenomena in the low corona • Acquire continuous dataset of low coronal observations for a half solar rotation at a cadence and wavelength coverage not possible with the regular synoptic program • Dataset to be useful for a broad range of CME and non-CME studies

  7. A Possible Campaign Observing Program • HI and Cor2: same as synoptic program • HI-1 : 40 min cadence, HI-2 : 2 hour cadence • Cor2 : 15 min cadence, polarization sequence every 30 min • Cor1: double synoptic cadence • 5 min cadence of 1k x 1k polarization sequences • EUVI: • 284 : 5 min cadence, ICER6 • 171, 195, 304 : 5 min cadence, ICER4 • 171 : fill in to 1.25 min cadence w/ ICER6 • 304 : fill in to 2.5 min cadence w/ ICER6

  8. Coordination with Other Missions • SOHO • EIT • LASCO • CDS • MDI • TRACE • Hinode • EIS • XRT • SOT • Coordination of limited FOV instruments to use same target, complementary cadence/FOV

More Related