Still on-sky tests are needed to verify the efficiency and alignment of the science grade array.

During the installation of the new array some tests were made of the dark current. The behavior with exposure time is similar to that with the engineering grade array, but it is not well understood. A closer look at the design of the controller showed some inconsistencies which need to be investigated in more detail and might require some modification of the controller.

Following our experience with the old detector we will monitor the reset levels. This will later be included in the quality-control procedure.

Also, there are plans to define a more time-efficient clean-array command which would limit any possible memory effects due to over-exposure.

Thomas Augusteijn 2006-02-02