Title :
MODIS geolocation error analysis developments
Author :
Nishihama, Masahiro ; Wolfe, Robert E. ; Fleig, Albert J. ; Kuyper, James
Author_Institution :
Raytheon ITSS, NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
The Moderate Resolution Imaging Spectroradiometer (MODIS) contains 36 bands from the visible to the thermal infrared with the nominal ground field of views of 250 m, 500 m and 1 km. This paper summarizes the changes to the MODIS Earth location algorithm and geometric parameters since the launch of MODIS on the Terra spacecraft in December 1999. Detailed analysis of residuals from a global network of ground control points reveals biases in unexpected areas of the MODIS geometric model. For instance, systematic off-nadir along-track errors are best modeled by a tilt in the mirror coordinate system. Analysis also indicates that some along-track errors are possibly caused by uncertainty in spacecraft attitude estimates. We discuss how reducing these errors enable sub-pixel geolocation accuracy goals to be achieved.
Keywords :
error analysis; radiometers; remote sensing; Earth location algorithm; MODIS geolocation error analysis; Moderate Resolution Imaging Spectroradiometer; Terra spacecraft; geometric model; geometric parameters; ground control points; infrared; mirror coordinate system tilt; spacecraft attitude; sub-pixel geolocation accuracy; systematic off-nadir along-track errors; visible; Error analysis; Instruments; MODIS; Mirrors; NASA; Orbital calculations; Parameter estimation; Science - general; Solid modeling; Space vehicles;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International
Print_ISBN :
0-7803-7536-X
DOI :
10.1109/IGARSS.2002.1027283
