As to spaceborne bistatic SAR

a new single-line effective squint range model is presented.Its sufficient condition is given

too.It is compared with three other range models which are second-order model

double-line equal velocity model and double-line double velocity model.The result of comparison in theory and simulation show that the single-line range model is an accurate

valid and simple range model.Because the model have the same form as the monostatic SAR

it can be applied to bistatic SAR imaging processing by monostatic SAR imaging methods.Lastly

the chirp scaling algorithm is used to bistatic SAR imaging based on this model.