The limiting accuracy for measuring the location of an optical image is set by diffraction and photon noise, i.e., by the dual wave-particle nature of light. A theoretical expression for the limiting accuracy is derived under idealized conditions and generalized to take into account more realistic circumstances, such as additive noise and finite pixel size. Its application is discussed in relation to different space-astrometry techniques including grid modulation, direct imaging, and interferometry.
|Research areas and keywords
- Astronomy, Astrophysics and Cosmology
|Title of host publication||Observing Photons in Space|
|Publisher||International Space Science Institute|
|Publication status||Published - 2010|