  We report on a measurement of interplanetary scintillation (IPS) using the
Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. Although
this proof-of-concept observation utilised just 3 seconds of data on a single
source, this is nonetheless a significant result, since the exceptional wide
field of view of ASKAP, and this validation of its ability to observe within 10
degrees of the Sun, mean that ASKAP has the potential to observe an
interplanetary coronal mass ejection (CME) after it has expanded beyond the
field of view of white light coronagraphs, but long before it has reached the
Earth. We describe our proof of concept observation and extrapolate from the
measured noise parameters to determine what information could be gleaned from a
longer observation using the full field of view. We demonstrate that, by
adopting a `Target Of Opportunity' (TOO) approach, where the telescope is
triggered by the detection of a CME in white-light coronagraphs, the majority
of interplanetary CMEs could be observed by ASKAP while in an elongation range
$<$30 degrees. It is therefore highly complementary to the colocated Murchison
Widefield Array, a lower-frequency instrument which is better suited to
observing at elongations $>$20 degrees.
