To measure the pixel locations (i.e. array orientation, scale) as a function of scan mirror angle for the 70 micron narrow array. The goal of this task is to estimate the location of the 70 micron narrow prime frame with repsect to the telescope boresight. The location of the MIPS instrument frames are found in the frame tables and are given as brown angles. In order to estimate the instrument pointing frame (IPF), a combinations of spacecraft moves and mirror motions places the star on several locations on the array. In addition, these observations are "sandwiched" between observations of stars with the two PCRS. The MIPS team calibrates data and centroids the star on the 70 micron narrow array. These centroided values are passed to the IPF team who uses observations of stars with the PCRS to provide the final calibration and estimate brown angles need to locate the instrument frame.
This task failed in campaign R because only 1 column of centroids could be found because of
the poor signal to noise on one half of the array. The IPF team could not find a solution with
only 1 column of data. Using Xsloper_View we looked at the images and the S/N on side B was poor enough that no centroids could be found. Therefore, we did not centroid this data set.
For a complete summary of frame table updates see :
Frame Table Updates: Meta task 2080