  This paper highlights a methodological approach designed to enhance the
search for extraterrestrial intelligence (SETI) by hypothesizing that a
transmission technosignature would likely have two features: 1) be wideband in
the microwave or higher frequency range that originates from a hub within a
supposed ET interplanetary navigation/communication (nav/comm) network, and 2)
contain x-ray pulsar-based navigation (XNAV) metadata.
  Potential contributions to the field include improved accuracy in finding
transmission technosignatures and other technosignatures in the electromagnetic
spectrum, a common standard in reaching a Schelling Point (a mutual realization
of how we and ETs can find each other), and operationalizing models such as the
Drake Equation.
