Summer Shutdown Progress Report
July 15, 2003
by Employee / Groups.
The 10 Meter Gang: (Steve, Bob, Bob, Pat, Mike.)
This is a summary of all that is finished from the summer shutdown list. A
similar one should be produced so that we can check off what is/has been done
from the Tucson side.
- So far, the biggest accomplishment has been the door and roof seals. The
seals between the bottom of the roof on both sides of the building were
completed the 2nd of July. Also, the roof seal, running across the top of
the right roof, was finished on the 9th of July. These three sets of seals
are the only seals that can be done without the aide of a man lift.
- Next, the hydraulic cylinder for the left door was rubbing along a lip
that spans the bottom of the opening for the cylinder. This lips on both
door cylinders were ground off, and seals were installed under the cylinder.
This was finished on the 9th of July.
- We have almost finish the 'fireproof' the building. We only have to do a
few extra little things.The building track has been cleaned. This was
accomplished on the 1st of July.
- We have inspected and grease the hot-vane slider. It is in good
condition. The tracks are in good shape, and the slider seems to run
repeatable and reliably.
- We changed the oil and checked the o-rings and cleaned the fittings for
the for the vacuum pump in the loft. We ran it and checked how well it held
a vacuum in the line to the right hand receiver room.
- The crane on the fifth floor was opened and examined. There was a
'cooked' bat in the casing of the electronics. Also, we found the
maintenance and operation documents. There are a few things that should be
done this summer as well as throughout the year to maintain both the door
crane and the crane in the loft.
- A complete list of the pm's for the 10M is being compiled and recorded
for future use.
- The plan for the rest of the week is to start on the doors in the
receiver room, clean and grease the AZ and EL gears, retape the insulation
on the cassegrain cabin.
- We removed the external charcoal traps for all three compressors in the
loft so that they can be brought to town. NOTE: The fittings for the helium
lines should only be tightened to 35-45 ft-lbs. The fittings were extremely
- Also, discussed with Martin about getting more caps for these lines.
They are good for not only keeping dust out but for keeping other
contaminates out and also to protect the fittings.
- Also, I have been investigating some efficiency measurement on Jupiter
with the sis230 receiver at 217, 220, 230, 241, 245 GHz. I have not
completed this, but the PSW procedure is giving about 80% at the low end of
the band and about 70% at the high end of the band for main beam
efficiencies. I noticed also that the BSW would consistently give Tant about
180-200K on Jupiter. This is too high. BVV and I looked into this and found
that the calibrations, the sky scan, is lower than the PSW cals. This
results in efficiencies with the BSW proc of above 100%, not possible. I
will write a memo about this soon. Also, I found that there are two
components to the baseline ripple, one at 16.42MHz and one at 11.49MHz.
These go with the distance from the cass focus to the subreflector and to
the primary respectively. 9347.915mm(second-focus) ~16.046MHz and
12610.8mm(primary- focus) ~11.895MHz. I will investigate this further also,
unless anyone has any other suggestions.
- BM and SB have been putting the light in the maser chiller room, and ML
and BS have been working on greasing the AZ and EL gears. Both of these
projects will be done today.
- Today, Steve and Bob finished the light in the chiller room and cleaned
and serviced the hydraulic system. And, Mike and I finished greasing the AZ
and EL gear. That is all.
12 Meter Gang: ( George, Paul, John, Sean, Mike )
- Inspected and adjusted all 24 Dome wheels.
- Cleaned all ac ducts and filters.
- Replaced Onan Batteries.
- Changed oil & filters on Onan.
- Removed 23mm receiver and sent downtown.
- Removed two compressors from telescope.
- Removed weight cage.
- Inspected and Repaired Dome Drives.
- Drained all gear boxes and refilled. ( 10 boxes )
- Began work on 480 track.
So far this shutdown I have completed:
- Construction, testing, and documenting in AutoCad the new 1-2mm IF
Attenuator for new SMT receivers.
- Built Fake Telescope test box for D. Forbes use in testing prototype
- Test and document results for electronic control circuits in 12M Tipper.
The following are being worked on now:
- Investigate and requisition replacement lamps for door control panel at
SMT. There is still the problem of the red lenses to be solved.
- Design, build and test new chopper driver and electronics for 12M.
- Design, build and test power supply for CTI frig for 12M.
- Build mixer test unit for downtown receiver lab.
- Document in AutoCad all new instruments I build. Assemble all data in
binders (1 copy for mountain and 1 for downtown.)
- Investigate and requisition parts and build other test units when required
by engineers rehabilitating 12M receivers and designing new SMT receivers.
2MHz Filter banks:
- Designed a printed circuit board (PCB) to replace the splitter board in
the 2MHz filter banks. Replacement board has been fabricated, stuffed, and
preliminary testing has been done. Board requires substitute splitter module
from Mini-Circuits. Items have been ordered and now awaiting them to continue.
Note: Board was designed to accommodate all the 12M filter banks, but
primarily to repair all the 2MHz and the 1MHz filter banks. Working toward
having the 2MHz filter banks repaired and aligned by end of summer. Most
likely, the 1MHz filter banks as well depending on any additional repairs that
Ferrite Modulator Driver:
- Prototype test circuit design for Ferrite Modulator Driver for receiver
has been completed. Design reviewed with David Forbes. Design appears to be
workable. I am currently working on layout of printed circuit board (PCB) for
initial prototype. Upon completion for testing with prototype design and
identification of required loop gain, a finalized design will be done to fit
slot and wiring of card cage.
- Began the major job of getting all Linux system up to the same Red Hat
release, 7.3, along with the newest kernels. This is no easy task as some
systems have special driver needs. Also I'm getting all systems on the "Red
Hat Network" which is an semi-automatic package updating system. If any
vulnerability is discovered by Red Hat in any of our package, then we are
notified and the appropriate new package can be upgraded.
- Install a DVD-R drive on smtoast. This replaced the broken CD-ROM and now
provides not only CD-ROM capabilities, but CD-R, DVD-R and DVD-ROM. I was able
to successfully create and read back a 4.7 Gbytes backup of the ~obs/sys area
along with all associated data files. This extends our data export
capabilities to DSS-2, DSS-3, CD-R and now DVD-R.
- Installed SMT Firewall on Friday July 11. This should afford us increased
security of our mountain systems. Over the next few weeks we will be refining
our "rules set" to allow normal operation but close out all others. We will
also begin to migrate all internal machines to the internal private network.
If you are aware of an outside user who can no longer login and use the
system, then their machine may need to be added to our database.
Summer Shutdown Progress as of 15 July:
- The terminal servers no longer need Kronen to download their software upon
power up. This is done by Smtocont.
- The X-terminals no longer need Kronen to download their software upon
power up. This is done by Smtocont.
- Hachenburger (the one that had the old Color Monitor display and the
Status (SDH) displays) has been given a flat screen monitor since the
original one had the former displays burned into it. It is now showing the
TrackerStat display (a duplicate of the display above the Krupp Rack).
Waldschloss (the other small one) still has its original monitor and has been
configured like Hachenburger. It is available for another (as yet unchosen)
- The XDM driver has been enabled on Smtoast. Now one can login to Smtoast
from Koenigsbacher as smtobs so that a second observer can analyze his data
while his colleague uses the Smtoast console.
- (Koenigsbacher is the X-terminal with the 21-in display which was used for
the Online Chef display and Xephem.)
- The bug that caused the "Sambus 80 changed spontaneously" problem and has
been squashed. The Sambus bits 24-30 (which include the receiver's Phase Lock
Status Bits) are now working. (Pete Hubbard found one of the Sambus units
needed repair and replaced it with a spare. And he found that the cable to the
Control Room Sambus unit was defective.)
- The clearance for the Optical Telescope fine focus stage was found to be
sufficient to replace the stage with the model that allows a travel of 1.8
inches. At the next opportunity, the Optical Telescope should be removed so
that the current stage (with only 0.5 inch of travel) can be replaced.
- The program that logs the UPS status has been ported from Kronen to
Smtocont. The porting of the programs that log the wind and the weather is in
- I'm ready to zap all comers with the Automatic Defibrillator!
- Following a disastrous 3 months of negations with the NSF to overturn our
denial of funding, NSF has recommended that we split up our first proposal
into three or four smaller projects and apply to the grants program. Still,
this approach does nothing for the outside community where recently we have
obtained more than 60 letters supporting our continued operations. Even so,
the director of the URO program will not budge on the idea of partial funding
of the observatory simply to allow for open access to the community. It is
vital that the outside community gain access to our facilities for us to
remain competitive in the field.
- In response to this situation, I am organizing a proposal which would
allow a minimum of 25% open access to the community to conduct science on the
KP12m telescope. I have already signed on about 10 co-Is from various
institutions in the US including UCBerkeley, UIllinois, UColorado, NRAO, and
CalTech to name a few. The proposal will be centered on the uniqueness of the
KP12m capabilities, namely frequency coverage in the 65-85 Ghz and 130-180 Ghz
with dual channel, single sideband receivers--vitally important to deuterium
studies and molecular line searches. Also, highlighted will be the efficient
operations (5663 hours on the sky last year with only 4% downtime for weather
and 4% downtime for receiver problems), zero-spacing observations for CARMA,
remote observing and matching funds from Research Corporation. Although this
proposal is somewhat unorthodox for a grants program, it offers some hope to
earmark some of the necessary funds to keep the KP12m operating at the 100%
level and it will allow for community access where most of our scientific
support has come from in the past.
Primary tasks :
- Complete the 2 inset, 2mm receiver for Mt Graham
- Review the receiver for installation of 1mm high and 1mm low inserts (4)
Steps required for 1 and 2
- Replace the existing 1020 refrigerator with a larger capacity balzers.
- Design an optics system suitable for 6 inserts with sideband dumps
- Complete cross grids and mirror for 2 insert 2mm
- Redesign frame for higher optics
- Test and evaluate all 6 inserts
- Design suitable pump injection system (waveguides and switches) for Gunns.
- Interface monitor and control to computer
- Refrigerator has been replaced
- Grid design finished and in shop for construction
- Optics system partially designed
- Interface 90% completed
I have done the following during summer shutdown:
- Talked with Pete Hubbard about replacing AOS IF relays. (Nothing has been
actually done yet.)
- Installed RedHat 7.3 Linux and RTLinux 3.2 on the filterbank computer
- Worked a bunch on new filterbanks.
- Assisted William J. on old 12M 2MHz filterbank IF splitter replacement
- Assisted William J. on ferrite modulator driver redesign.
My main task during summer shutdown thus far has been to assist others in the
performance of their duties. I have mainly been tasked with assisting Grahame
and Martin with the receivers (namely the new JT system for Mt Graham) and have
since taken over the charcoal trap filter regeneration process. Occasionally, I
have the opportunity to help out Bill Hale with vehicle issues or running
various errands. I look forward to assisting whenever and wherever I am needed
to help make summer shutdown a success.
This is the report of my progress so far.
- I have finished moving, re-installation and setting up the right paths for
the several software packages needed for the continuum data conversion to the
NIC format. They are all now in the /home/smtop/tonic directory. I have also
added a couple of new features to the software to make it more robust for
single-pixel RXs when used in continuum (for instance, to be able to get a
beam map for each of the JT inserts, etc.). Finally, it can also be used
(provisionally, see below), to reduce skydips for single pixel RXs.
- I have also patched several packages in the GILDAS software frequently
reported by observers/operators. Among them, I have now included a beam size
calculation for the HHT/SMT in the ASTRO program (this had never worked in any
of the releases and we had to use the CSO defaults instead).
TODOS: This is the status of the rest of projects I have in my hands at the
- AIPS @ the 12m: I have been tracing the start-up problem that we are
experiencing at the 12m. I have checked all the start-up files and seem to be
OK. I am now going a bit deeper to see what routine is the one responsible for
kicking us out just before the POPS session starts. Hope to have everything
clarified by the end of this week.
- Solar System Body Ephemeris: I have written the C libraries I will be
needing for TT to UT1 conversions, UT1 to JDT, position of body on
interpolated osculating elements, etc. At the moment I am about to package the
whole thing into a more compact form and include the new JPL405
ephemeris for the Planets and Minor planets in the final version. We will have
to discuss the final interface from tracker.
- Skydip reduction of SIS RX data: Finished the basic program structure. At
the moment deciding on a user-friendly widget environment for the displaying,
etc. The program includes the ATM atmospheric model and will take into account
the fact that some of the RXs will be DSB, etc.
- (Also writing a paper)
- The main focus has been on the JT and 1mm receivers and their associated
cryogenic systems. The major component has been the change over of Helium
refrigerators from the Kitt Peak 1mm to the Mt Graham JT receiver and the
associated redesign resulting from these changes.
- A charcoal trap baking device has been constructed and regeneration of the
two sites charcoal traps has started.
- Two Balzers UCH 130's have been rebuilt for the Mt Graham JT and Kitt Peak
- Modifications to the Korn compressor which is to used as an emergency
compressor for the CTI 350 systems is also underway.