  We investigate stable operations in supersingular elliptic cohomology using
isogenies of supersingular elliptic curves over finite fields. Our main results
provide a framework in which we give a conceptually simple proof of an elliptic
cohomology version of the Morava change of rings theorem and also gives models
for explicit stable operations in terms of isogenies and morphisms in certain
enlarged isogeny categories. We relate our work to that of G. Robert on the
Hecke algebra structure of the ring of supersingular modular forms.
