been framed for ghost imaging of transmissive targets. Recent experiments have shown the feasibility of an alternate ghost-imaging configuration, in which the bucket detector views the target in reflection, rather than in transmission [@Meyers2008]. In this reflective setup, the source and detector can, in principle, be moved arbitrarily far away from the target, suggesting that ghost imaging could be a viable remote-sensing technique. Atmospheric turbulence will surely be a relevant concern in any such standoff-sensing application, just as it is for astronomical imaging and laser radar. To date, there has been theoretical study of the impact of turbulence on ghost imaging in transmission [@Cheng2009], but there has only been an initial turbulence-free theory development for ghost imaging in reflection [@Hardy2010], and that work was limited to pseudothermal sources.

In this paper we will extend the analysis from [@Hardy2010] to include SPDC ghost imaging in reflection and, for both SPDC and pseudothermal operation, the presence of atmospheric turbulence in the propagation paths. The setup we shall consider is the lensless ghost-imaging configuration shown schematically in Fig. \[fig:setup\] [@footnote1]. Pseudothermal ghost imaging can be described quantitatively using semiclassical photodetection theory—in which the fields are described classically and photodetection incurs the shot noise 