Summary of meeting #1: On February 8th, 3-4:30 pm, the observing system design group met with the low-dimensional behavior group. Observing system design algorithms can be broadly classified as 'sensitivity' or 'uncertainty' based algorithms. Some sensitivity based techniques are related to ideas from low-dimensional behavior (especially singular vectors). A number of references on low-dimensional behavior can be found on the low-dimensional behavior website. A number of references for uncertainty based techniques will be added in the near future. The following is a list of topics that were brought up as areas of interest in this working group:

• Observing system design for Lagrangian observations
• Relationship of sensitivity based techniques to low-dimensional behavior

In the next meeting of February 15th, 3-4:30 pm, it was suggested we could begin by discussing various ideas in low-dimensional behaviour: bred vectors, singular vectors, lyapunov exponents and move on from there.

The observing system design group continues to meet with the low-dimensionality group.
For details, please go to the low-dimensionality website
( http://www.samsi.info/200405/data/activity/groups/lowdimensional/index.html )