Imaging Spectrograph Data Types
This page is designed to describe the data products for various types of imaging spectrographs so an idea of the requirements for a Map derivative data type can be derived.
When adding an instrumet please focus on the data produced, information such as resolution in all axes, imager type i.e. scanning or Fabry-Perot type etc.
EIS has 2 modes of working, known as slit and slot, and each of them has two widths 1 and 2 arcsecs for Slit, and ?? and ?? for slot.
Both slit widths are used in the same way, which can be as raster or time series. The difference on the data is that raster has a movement on the Solar-X axis while taking images, and the time series are normally static and take different exposures of the same location at different times - notice that time always changes with each exposure.
These images shows a raster on the left and a time-series on the right for a particular window. On the raster, x = x(t), so each exposure happens at certain time.
EIS does not save all the data in a single block, just the windows selected as different blocks. The spectral window can vary in a single file, but not the mode (raster, time-series).
There's also a what's called a fast raster which the slit moves between each exposure more than it's width, getting an image such ...