Description
The TES Aura L2 Ancillary Product contains the data items that are consistent for all Level 2 data products for both Nadir and Limb. One ancillary file is created for each global survey. Prior to 24 April 2005, ancillary files contained data common to both nadir and limb views. Since 24 April 2005, each ancillary file consists of a single swath. Prior to 24 April 2005, each ancillary file consisted of 5 swaths: Nadir 1, Nadir 2, Limb 1, Limb 2, and Limb 3. A Nadir sequence with in the TES Global Survey is two low resolution scans over the same ground locations. The Nadir standard product consists of four files, where each file is composed of the Global Survey Nadir observations from one of four focal planes for a single orbit, i.e. 72 orbit sequences. The Global Survey Nadir observations currently only use a single set of filter mix. A Limb sequence within the TES Global Survey is three high-resolution scans over the same limb locations. The Limb standard product will consist of four files, where each file will be composed of the Global Survey Limb observations from one of four focal planes for a single orbit, i.e. 72 orbit sequences. The Global Survey Limb observations use a repeating sequence of filter wheel positions. Special Observations can only be scheduled during the 9 or 10 orbit gaps in the Global Surveys, and are conducted in any of three basic modes: stare, transect, step-and-stare. The mode used depends on the science requirement. See http://tes.jpl.nasa.gov/instrument/specialobservations/ for details.