- Metrics and Models for the
Perceptual Design of Virtual Transparency - Progress (12/98~01/99)
A new Tower Simulation smoothly displaying
aircraft trajectories from episodic, time- stamped data has be
completed and runs well. It should be possible to run it at 30hz
with 60 aircraft and at around 60hz with 30 aircraft. There were
several meetings with the Task Requester to assess the quality
of the calibration of the adjusted see-through helmet. The stereo
parameters were modified. The company who designed our API is
currently being contacted regarding several issues involving
aspects of the API that do not appear to work as expected. Discussions
have been held about the integration of the predictive filter
driver and the modification of AST to use the new calibration
tables and the filter driver seamlessly. The predictive filter
has been optimized to closely track measured position and remove
most of the positional noise introduced by initial implementations.
Pilot testing indicated that ad two step prediction of 33 msec
provides correction for the system rendering delay with apparently
subthreshold prediction artifact. An experiment is being designed
to verify this observation. Latency discrimination experiments
have been completed with six subjects confirming initial observations
that base reference latencies between 27 and 193 msec have no
effect on latency discrimination. Weber's Law appears violated
for this judgment.
SIGNIFICANT EXTERNAL LIAISONS:
The SBIR Phase I contract is underway with
a consortium organized by Seagull Technologies, and visits to
local ATC facilities are being planned.
ISSUES:
None.
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