The Portland IV
Annual Alt-Az Initiative Workshop will be held on Saturday and
Sunday at Dan Gray's Sidereal Technology plant, preceded by an
informal BBQ on Friday evening, July 30. Last years Portland
III Workshop featured a wide variety of speakers, and was
featured in Amateur Astronomy magazine as will be this
years workshop. Topics this year will include lightweight
mirrors, large alt-az telescopes, advanced control systems,
instruments (including near IR aperture photometers), and other
topics. Howard Banich is chairing the workshop, and Dan Gray is
the local host. If you plan on attending, please contact Howard
www.AltAzInitiative.org for the latest information on the
A nearby hotel is
Monticello Motel Station, 4801 North Interstate Avenue <http://maps.google.com/>
Portland, OR 97217-3623 <http://maps.google.com/>.
to the Technical Marine Service, Inc. on Swan Island:
From I-5 northbound (or southbound also) take exit 303 (Swan
Island exit) and head west after
you get off the freeway. From the northbound direction, this means
staying to your left and
heading west on North Going Street.
Follow this past Interstate Ave. and go down the hill
towards Swan Island.
Get in the right hand lane and at the bottom of the hill follow
the signs to Mocks Landing and veer
to the right onto Basin Ave.
Go about 1.5 miles to the signal light at Leverman and
turn right and go over the bridge to the first
street on the right, which is N. Cutter Circle.
Turn right on North Cutter Circle and go to the end of
the block to 6040 North Cutter Circle.
TMS is in the first building as you turn in the driveway
(there's a big "TMS" on the side of the
building. Parking and entry for the workshop is at the side of
(Some of the topics, talks, and discussion areasmore will be
Friday, 7/30 (6pm)
Welcome BBQ at TMS
Saturday 7/31 (8:30am)
Introduction and agenda review
Whats the telescope for?
Richard, Jo, David, Russ,
Gary Cole. Bob Nelson, David Haworth, Bruce:
Occultations (Lunar and asteroid)
Light Bucket astronomy
Light Bucket Mirrors,
light bucket mirror theory (figures of merit
Pneumatic LBTs, Evaluation of other new types and coatings
(Starstone, solar, Peacock Labs).
Visual observing -
Brief history of the alt-az telescope
Richard, Peter Abrahams
Herschel and Lord Rosse
Mel, David, Drew, Peter Chen, Bruce, Umesh and Brian
Active primary and secondary optics
Closed loop control of membrane mirrors using electrostatic
Laboratory experiments on electrostatically controlled membrane
Correctors Lenses, Deformable Secondary.
Spherical aberration correction via spherical refractive
Sunday, 8/1 (9:00am)
Direct drive motor and controller
Dan, Dave and the PlaneWave gang
Fast Detectors, Area (CCD & CMOS) and diaphragm (high speed
Update on Russ Genets 1 meter scope
Professional alt-az updates
CDK700 - Dave
1 meter CDK Cassegrain
Future plans - what scopes and instruments are being planned by
Telescope Portability -
Wrap up, going forward