DSES at the 2019 Haswell Bazaar

By Gary Agranat. Participating were Bill Miller and Gary Agranat.

Bill Miller at the DSES table at the Haswell Bazaar.

Bill Miller and Gary Agranat represented the Deep Space Exploration Society at the 2019 Haswell Bazaar last Saturday, October 26th. The bazaar is held at the town’s community center, which is their former elementary school. At the bazaar are crafts, foods, and specialized products sold by local residents. Our antenna site is located just a few miles from the community center. The fair is also an opportunity for the local residents to socialize. And for us in DSES, it is a chance for us to socialize with them too.

Bill Miller created two new display panels for the event. These present an illustrated overview of our work and accomplishments to date. The panels are organized into four topics: infrastructure work, our radio astronomy science, ham radio, and outreach.

Gary brought a laptop which presented a running slide show of about 180 photos of our activities from the past year.

The Haswell Bazaar featured local art & crafts and foods, cosmetics and health items, and Fuller Brush items. The Kiowa County Library had a table next to us as well.
Michelle Nelson, the Mayor of the town, cooked the lunch for the bazaar. The main entre was a choice of home cooked chili or soup. Several of her children assisted. Various cakes were served for desert.

The Haswell Bazaar was held at the town’s community center, which is their former elementary school.
The community center in Haswell.

The bazaar concluded by 3 PM. The bazaar was a good opportunity for us to participate in the community activities, to show to the community what we do, and to continue to foster our good relationships with each other.

* * *

During the past year, the local railroad line that runs east-west through town had restoration work begun. The line had been abandoned several decades ago. We learned that the original Haswell railroad depot building is still in town. We were told where it is, and we went to look. We were told that if passenger rail service was restored, there was interest to restore this depot, and bring it back to the rail line and utilize it again. It is the only surviving railroad depot building from the original Missouri Pacific Railroad.

* * *

After the bazaar was finished, we stopped at our Plishner antenna site. There we looked at the progress of the ham radio tower. And Gary retrieved the ham radio log data from the most recent contacts. Steve Plock made our first contacts with the Yagi antenna on the new tower last Friday. He contacted AG5Z in Mississippi on the 20 meter band, and 9Y4D in Trinidad on the 15 meter band.

Our new 50-foot ham radio tower at the Plishner radio astronomy site. At the top of the tower is a 3-element triband HF Yagi antenna mounted on a rotator and shaft. Above the Yagi is a VHF vertical antenna for the site’s local talk-in radio system.
In addition to the HF Yagi and VHF vertical antennas at the top, the tower supports our dipole wire antennas for HF 80 and 160 meter ham radio bands, and a delta loop wire antenna for the 6 meter band.
The tower is securely supported by guy cables.
On Friday Ed Corn and Steve Plock added the installation of this messenger cable, to keep the coax feed cables above ground and organized.

Antenna Raising

Plishner Antenna Site Work Trip Report. By Gary Agranat. Photos by Steve Plock.

Ed Corn, Steve Plock, and Gary Agranat traveled to the Plishner antenna site in Haswell this past Saturday, October 19, 2019. The team completed erecting the 50-foot ham radio tower.

Completing the tower erection involved several tasks:

  • Installing the 3-band/3-element Yagi HF ham antenna,
  • Installing the 2-meter band vertical antenna on top of that mast. This will be our new antenna for our VHF talk-in radio system.
  • Installing two stand-off bracketed supports near the top of the tower on the sides, to raise and hold the 80 meter band and 160 meter band dipole wire antennas. This arrangement replaces the long pole that previously centrally supported those wire antennas. These bracket supports each have a pulley and rope, to raise and lower the wire antennas. The tower also supports a 6-meter band delta-loop antenna, which is simply tied from height.
  • Securing the coax cables for the Yagi and vertical antennas along the side of the tower.
  • Properly arranging the system of wires, coaxes, and support cables.
  • Raising the 50-foot tower, which involves turning the winch system that rotates the tower up from its pivot plate at its base. The 50-foot tower is raised from a pulley system on a second smaller adjacent tower.
  • Once the 50-foot tower is raised, securing 3 guy cables.
Steve took this photo of Ed and Gary at the completion of the tower raising.

Steve tested the SWR of the 3-band Yagi antenna with an analyzer. The antenna elements had been measured and assembled on a previous trip, to be optimized for the middle of each of the operating bands, of the 10, 15 and 20 meter bands. Steve measured an SWR ratio of 1:1 (perfect) at 28.51 MHz for the 10 meter band, and 1:1 at 21.19 MHz for the 15 meter band. The 20 meter band resonated with an SWR of 1:1.35 at 14.16 MHz. This is excellent, and as expected.

For lunch, Steve treated us with smoked ribs from Broken Bones BBQ in Monument, with sauces, potato salad, and coleslaw. Gary brewed coffee. Also, the team met first at the firehouse in Ellicott. Gary baked orange-cranberry muffins. We ate our muffins at the firehouse, and shared the rest with the fire department crews there.

The team left the Plishner site by 4:30 pm.

The tower work began about a year ago. The work involved support and efforts by a number of team members. See our past posts from October 19-21, 2018 http://dses.science/plishner-site-report-for-the-weekend-of-october-19-21-2018, August 24, 2019 http://dses.science/plishner-work-trip-report-august-24-2019, and September 28, 2019 http://dses.science/work-site-trip-report-at-the-haswell-plishner-radio-telescope-site-september-28-2019.

The tower should significantly improve our capability to communicate long distances on the 10, 15, and 20 meter bands with the Yagi. The 2 meter band vertical should enable us to communicate on our talk-in VHF radio system to much further out.

Very Large Array (VLA) Image Reduction Results

Recently Dr. Richard Russel attended the Very Large Array (VLA) Imaging course in Socorro, New Mexico. This course taught how to take the data sets from the VLA archive and produce images. The following is the first set of images reduced from the VLA archive by Dr. Russel.

Images were made of these astronomical objects:

  • 3C75 Binary Black Hole System
  • 3C391 Supernova Remnant
  • Asymptotic Giant Branch (AGB) Star IRC+10216
  • MG0414+0534 Gravitational Lens HI Absorption Line

Each image takes about 1 day to produce from the raw observation.

http://dses.science/wp-content/uploads/2019/10/VLA-Imaging-Results-1.pdf

DSES September 2019 Engineering and Operations Meeting Minutes

Minutes by Bill Miller

Attendance: Ed Corn, Gary Agranat, Myron Babcock, Phil Gage, Rich Russel, Bob Haggard, Dave Molter, Lewis Putnam, Jonathan Ares. Online via TeamViewer: Tony Bigbee.

Next work Trip in 21st of Sept.  Gary and Ed may also use the 28th for to work on the tower.

  • Pointing System 1 HW/SW status and completeness: Phil Gage, Dave Molter,  Johnathan Ares
    • 3 weeks ago. Fixed the bad bit by jumpering to another channel and changed the SW to match.  Tested and Ed verified last weekend.
    • Dish mount stiction and inertia make continuous control too erratic so need to do a step and drift control.
    • The team took data on the command voltage verses speed and found both axes to be pretty linear.  See the graph.
    • Glenn added a computer supported manual control that tells the operator what commands to give the system to track manually. A little labor intensive but works.
    • With elevation axes is now stable and we should do a calibration using astronomical objects.
    • Should also mark the feed horn mountings to reduce the RF pointing error when changing or reinstalling the feed antenna.
    • Make a table of offsets for each feed and do a calibration for each feed.
    • Bill gave system 1 team the control relay circuitry used in System 2.
  • Pointing System 2 HW/SW status and completeness:  Bill Miller
    • The PID control system that Ed Johnson implemented in the SW has been tested and can drive the dish mount to within one or two bits on the encoders.
    • The system worked fairly well on the last test in July except that the system would hang up and continue to drive the mount when it should have stopped.  This sometimes caused an overshoot or required manual shut down. 
    • Bill is building a physical simulator to make it easier to trouble shoot the system 2 without the Plishner Dish.  In this way Ed can work on the SW at home and work out these last bugs.
    • It would be nice to have a second spare encoder to work this but the lowest cost one found on eBay was over $500.
  • Synchro pointing system status and completeness:  Bill Miller
    • The Azimuth Synchro system worked when installed last year.  Bill installed the Elevation Synchro in the early June Trip but when testing there was a problem in the system with a fault to ground.  This is 120VAC supply current flowing where it shouldn’t and must be fixed to be safe. 
    • Several of the old terminal boxes were used in the hookup.  Bill suspects that one of those is causing the leakage.  We will have to trace down and correct this before the synchro can be used as a backup pointing system. 
    • Members are asked not to plug the synchro panel into AC power until this is resolved.
  • Dish Feed system status and changes
    • There was apparently a lightning strike on the dish this summer that took out the feed electronics and the power supply in the trailer.
    • Steve worked on the feed and found a bad amplifier. Steve rebuilt the amplifier pack and still found another bad amplifier.  Skip sent Steve a set of amplifiers that he will install on the next trip.
    • Steve has the noise source to test the RF through the amplifier chain.
    • The power supply was also bad, and Skip shipped a new one that works.
  • Preparation for Stratospheric and Moon Bounce (EME) radio operation.
    • Ray and Steve terminated the hardline on the 3rd deck and will attach to extensions down to the tower base. One hard line is complete.
    • Need to be careful to get the feed mounted exactly as we had it.
    • Hope to be able to do Stratospheric long distance communication and Moon bounce (or EME) in the autumn or near future.
  • Status of Hydrogen Detector at Rich’s House
    • Rich has taken 4 declinations in a daily drift scan and is generating a composite color image of the HI emission.
    • Ray added a second LNA in the system that works much better than the first.
    • Drift scan HI is working well and anyone in the core group can get the data from Rich’s computer.  Send him an email.
  • Pulsar Detector Status
    • Have the Cavity filter and Low Noise Amplifier for pulsar has just been received and we have the SDR made for this calibrated and ready to go from Steve and Joe Martin in New Mexico.
    • Will try for the strongest Pulsars with the long Yagi in Rich’s back yard.
    • A dish with tracking or a Yagi array would be better.
  • SETI observation plans and schedule
    • Steve has a time crunch to fix the feed, power supply and amplifiers and make it work by the end of  September for a 3 day run.
  • Plans to do Tropospheric Radio Communication
    • Want to do Texas, Kansas, New Mexico and Wyoming
  • Plans for Moon Bounce Radio Communication
    • Tentatively considering upcoming ARRL contest weekends. Two weekends in October 19th and 20th and November 16th and 17th.
  • Ham Radio Station and Antenna Status
    • Ed and Gary built the 50-foot tower and are ready to mount the tribander beam antenna for 10, 15 and 20 Meters on the rotor.
    • Will also mount a 2 meter antenna on the side of the tower for the talk in radio.
    • Ed reworked the buckled pipe section of the vertical antenna with some clamps and bradding to make a splint to repair.
    • Gary rechecked the vertical antenna SWR with an antenna analyzer. He reports antenna is working as well or better. He posted a table of SWR values for each band behind the station operating desk.
    • Repaired the broken radios.
    • Gary operated three QSO parties: for Hawaii, Ohio, and Kansas, and made CW and SSB contacts on all three.
    • In the open house we had a special event station and had a number of members get on the air.
    • When using the Ham radio Equipment make sure to unplug the Antennas from the radios when you leave.
    • The tower is a tip down design.  The winch will tip down the tower to be able to lower the antenna and work on the antenna.
  • Infrastructure items
    • Ed has the Electrical system built out.  A couple of stubs for add ons are all that is left.
    • Construction
      • Need a 32-inch steel clad pre-hung door for the top of the spiral staircase.
      • Need cement board to skirt the trailer.  Dave may have some.
      • Installed the mid hallway door and it needs the blocking panel at the top
      • In the future would like to slit the tool room into two compartments.
    • Plumbing
      • After he amateur tower is finished Ed will install the hot water heater.
      • Will also install a European type shower.
      • Ed wants to have a dump station with a grinder pump and pump out the sewer line.
      • Ed uses a deveining rod method to locate the pipes and wires.
      • He says the sewer line runs to the SE corner of the lot were there is a square vault and then a pipe leaves that and goes across the road.
  • Outreach
    • Open House.  Bill owes the group a report.
      • Need the Attendance list from Myron which was let in the Comm. Trailer
      • Need any additional photos that you took. Paul Berge may have more.
      • October Haswell Bazar.  This will be in late October. Bill and Gary plan to support a table.
  • Myron’s Treasures Report
    • 2067.75 Checking
    • 5740.11 savings
    • At Monument Mega Fest made $356 selling surplus equipment.
    • United way Philadelphia $30
    • Collected $260 in dues and a $50 donation, $88 in food donations for the open house
    • Expense for electric account is $128 for July and will be between $70 and $125 monthly.
    • Telephone is $38.25/month for only 911 and the local exchange
    • 55 members 35 voting 25 not voting
    • 18 have not renewed
    • $90 charge for Eads newspaper ads for open house
  • General Discussion
    • May approach Dalton Eichenberg on spraying or getting a brush hog on the site.
    • CHIMES program in Canada. Canadian Hydrogen Mapping Long term project. They need infrastructure, power and fiber. 150 by 150 ft. footprint.
    • The block wall has made a big difference in the mud flow.
      The bulker hasn’t had a lot of water since the pump was replaced. 
      Batteries in the battery box in the battery room are dead and Ed will hook in the RR batteries for the Inverter power.

Hydrogen Drift Scan using the new 9-foot Dish

By Dr. Richard Russel

The DSES 9-foot dish is operational at Dr. Russel’s house in Colorado Springs. It is outfitted with a 1420 MHz feed with 2 low-noise amplifiers with over 40 dBi of gain and a noise figure of 0.35. The receiving system is a Spectracyber 1.

The output of the Spectracyber shows the relative peaks of hydrogen with a corresponding Doppler measurement.

Dr. Russel performed a drift scan of the visible sky and plotted the relative peak hydrogen signals.

The hydrogen maps very well to the visible Milky Way. The plot below converts the Celestial Coordinates into Galactic Coordinates. Note that the peak hydrogen is concentrated near the 0 Galactic Latitude.

Special Thanks to Ray Uberecken and Steve Plock for helping to set up the system.

For more information:

Dr. Richard Russel: DrRichRussel(at)netscape.net

Deep Space Exploration Society: www.DSES.science

Work Site Trip Report, at the Haswell Plishner Radio Telescope Site, September 28, 2019

by Gary Agranat

DSES Participants: Gary Agranat, Ed Corn, Bob Haggard, Bill Miller, Steve Plock.

Ed, Gary, and Bill met first at the Ellicott Fire Department, while Steve and Bob each traveled ahead solo. Ed encountered a problem with his truck and had to return home, but he passed the tower antenna mast and connector supplies to Bill. Steve and Bob arrived at the site by 9 AM, and Bill and Gary arrived by 10 AM.

We encountered light drizzling rain and low clouds on the route to the site, but the rain let up once we were on Highway 96 past Ordway. Steve called Ed to let us know the weather was good at the site. The weather completely cleared later, while the temperature remained comfortable.

Steve coordinated by phone with Skip Crilly and commenced a 48-hour long SETI drift scan at -7.5 degrees declination, run simultaneously with Skip’s antenna in New Hampshire. The 48 hour run will scan the -7.5 degree declination band twice, and therefore acquire a repeat set of data that can be compared with the first set.

Bob worked at the Communications Trailer, doing carpentry and painting work. He built a wood frame seal around one of the air conditioners, fabricated and painted a seal for the solar-powered fan, and painted the third work table he had added previously. Bob told me the trailer back door hadn’t been sealing — until recently — because it actually had not been closed properly. He closed the door properly and it is now sealed, without requiring further work.

Bob at work.

Bill, Steve, and Gary worked on preparing the 50-foot ham radio antenna tower.

Bill spliced the controller feed cable and wires for the antenna rotator, and verified proper operation, with some assistance from Gary. Bill used Steve’s crimping tools. The three of us then fed the controller cable through the dog house to the tower.

Bill first checked online for the correct color code standards for the control cable wiring. Then he matched the correct colored wires from the cable to the wires on the rotator. After the wiring was completed, the rotator and controller were tested for correct operation and correct meter calibration.

At the tower outside, the rotator was attached to its base plate, and that assembly was then attached to the tower.

When we tried to fit the mast in the holding tube at the top of the tower, we found that top opening was slightly damaged, and the mast wouldn’t fit in. We then took turns filing and grinding out the hole until the mast did fit properly. Steve applied a lubricating grease, to mitigate against the mast binding stuck when rotating. Eventually we successfully installed the mast to the rotator itself. We also retrieved a guy wire cable left at the communications trailer and attached it as the third guy wire connection for the top of the tower.

Bill with Steve, filing out the top opening for the mast. You can see two of the three guy cables already attached to the top of the tower.
Steve
Gary
Bill and Steve fitting the mast at the tower top. The mast was then securely fastened to the rotator.
The 60 foot antenna positions at 39.5 degrees elevation for the 48-hour SETI run, in progress.

Before we left for the day, we had two visitors from Eads come to look at the site. We all spent a little while talking about the site and the work.

Addendum

By Gary Agranat

Bob was the first to leave, then Steve. Steve said he would check on Ed on the way home. Bill and I (Gary) convoyed out last.

While Bill and I were driving back to Colorado Springs, about an hour and a half into the trip back, an auto accident happened right in front of us, with a vehicle overturning.

The accident happened while we were driving westbound on Colorado Highway 94. It was early evening by then, about 5:30 pm, and the sun appeared above in the western sky. Bill and I had been talking on the VHF ham radio during our 2 1/2 hour drive back from the site. Bill was driving ahead of me.

A couple of miles before Rush, I saw three vehicles approaching from a long distance behind, moving faster than Bill and me, while we were going at about the speed limit. I mentioned the vehicles to Bill, and we stopped talking, anticipating they would choose to pass us soon. They did soon pass us, all three staying close to each other. We could see they were some sort of laborers, with equipment filling their vehicles and with ladders on top. The third vehicle passed us as we were going up a hill, with the solid yellow line on our side. Bill commented that car was taking risks, although they all were driving in a risky manner. There was no visibility over that hill. And furthermore we were driving into the sun. A couple of miles later we reached the town of Rush, where the speed limit lowers from 65 to 50 mph. As those three vehicles ahead approached the town, I suddenly saw the last one veer to the left side of the road, and then roll over, with its front turned facing the opposite direction. Bill and I both stopped, as did a driver heading in the oncoming direction who almost got hit. And several more cars stopped briefly. We saw one occupant lie in the grass, but he eventually got up.

Bill had a better view of the accident ahead of me. It looked to him like one of the three vehicles ahead suddenly slowed as he reached the town with the lower speed limit. The sun was right above and ahead of us, which created a greater visibility challenge. The sudden slowing apparently caught the last driver off guard, as he swerved to the right to avoid the vehicle ahead of him. But that put his right side of his car in the grass there, which caused a tire blowout and a swerve then to the left. And he overturned.

The volunteer fire department nearby responded relatively quickly. But we waited about 2 hours for a sheriff’s deputy to arrive, and then another hour for a State Patrol officer to arrive. The State Patrol was who we had to give our witness statements to. We didn’t finish with that until 8:30 pm, and I didn’t get home until 9:30.

The driver of the overturned vehicle eventually got up, but he refused medical help, although we wondered if he nonetheless might have been hurt.

Meanwhile the communities there are small, and everyone there knows everyone else. The other driver who stayed was a local woman school teacher. We chatted with her and also the volunteer firefighters, and with some of the neighbors who stopped to see if everyone was OK.

The State Patrol officer later explained to us that there were 6 accidents in the region called in within a period of 5 minutes, when our accident happened. One happened just about 9 miles further west from us on Highway 94, in the town of Yoder. That accident had injuries, and some of the firefighters who were with us then had to leave to respond to the other accident.

At a minimum, this is a reminder to take care to drive safely, especially with limiting conditions like the sun setting ahead.

First Light of DSES 9-Foot Dish Antenna at Rich Russel’s Home

by Dr. Rich Russel, DSES Science Lead

Part 1 – September 2, 2019

Ray Uberecken came over today with another LNA, which we put in series with the first LNA. This did the trick and overcame our cable loss problem. I conducted a small drift scan across the galactic center at -32 Declination. Here is a quick result.

I will spend the next couple of days fine tuning the azimuth pointing and weatherizing the LNAs.

I will forward information to allow certain members teamviewer access if they want.

Thanks Ray and Steve Plock for their technical support!!

Part 2 – September 4, 2019

The 9 ft dish at Dr. Russel’s house is operational!
It is set up to collect neutral hydrogen frequencies at 1420.406MHz.
Today the dish azimuth was aligned using the Sun and a level.

The receiver is a Spectracyber 1 from Radio Astronomy Supplies. 
Below is the measurement of the hydrogen spectrum near the galactic center.
RA 17hr 58min DEC -32 degrees

Training on the use of the system will be conducted at the science meetings.

Dr. Russel

Plishner Work Trip Report – August 24, 2019

By Gary Agranat

Participants: Ed Corn, Steve Plock, Gary Agranat.

Ed, Steve, and I traveled to our radio telescope site, leaving from the Ellicott Fire Department a little after 7:30 am. We encountered just a little fog on the way.

Steve worked primarily on troubleshooting the amplifier failure on the 60-foot antenna fiber optic feed. Steve found a power supply no longer functioned. He wrote me later, “Damaged parts have been ordered and will be replaced at the earliest convenience.”

The 60-foot antenna dish was rotated so that Steve could access the feed from the service tower.

Ed Corn and I worked on assembling the 3-element tri-band Yagi antenna from Myron Babcock, and then the ham radio tower by the bunker, on which the Yagi antenna will go.  We measured and reassembled the three Yagi antenna elements and the boom support for them.  We’ll wait to combine those until we are ready to attach the antenna to a mast and on to the tower.  The antenna will operate on the ham 10, 15, and 20 meter bands. We decided to set the lengths so that the antenna tunes best in the center portions of the bands.

Assembly of the three elements of the tri-band Yagi antenna and its supporting boom.

We assembled the tower components out to a length of 50 feet, including the top that will hold the rotor. The tower is now designed and built to rotate from a pivot point next to the existing tower that had been started earlier.  Ed climbed that original tower to install the pulley; the pulley leverages and pulls up the 50-foot tower by rotation at the pivot.  We tested lifting the 50 foot tower with the hand crank winch that I think came from Steve.  The design works.  We eventually will need to take down the mast that supports the 80 and 160 meter dipole antennas, to complete the tower build-out.  We plan to re-attaching those antennas to the tower itself, when we are ready to complete the tower.  Ed has already fabricated two standoffs that will attach to the sides of the tower, and centrally support the dipole antennas.

Ed from time to time went to help Steve. And Steve once in a while came to help with the tower assembly.

The base of the new antenna tower pivots next to the already existing support tower. The rotating winch on the support tower will pull the antenna tower and lift it up or down.
On each of the three connecting tubes, on each of the tower elements, a set of two screws each were bolted to fasten the connections.
Ed Corn attached a pulley (fabricated before) to the support tower.
Three of the 10-foot antenna tower sections connected, and connected with the base pivot. The cable from the winch has been threaded through the pulley on the support tower above, and connected to about the 20-foot point on the antenna tower. The pipe mast visible in the photo is the center support for the existing 80 and 160 meter dipole antennas. The new antenna tower, besides supporting the directional antennas at top, will replace that mast and support those dipoles.
We tested rotating up the antenna tower with three 10-foot sections assembled. After Ed verified that the placement of the pulley was good, he securely fastened it.
The winch with cable installed, used to lift and lower the antenna tower for service. The handle crank is geared. The lock pin enables free movement, movement in one direction, and locking.
The top section of the tower, ready to be attached.
Steve helped Ed and I complete the final assembly of the tower.

We had a lunch break together in the bunker. I brought a small coffee maker and brewed coffee for Ed and me.

The weather was good, considering the heat we’ve been having lately.  High cirrostratus and mid level clouds from storms in the distance covered us for the afternoon, and kept the heat and sunshine comfortable.  We saw rain showers in the far distance, but those never came close enough to bother us. The bunker thermometer read 75 F, and outdoors was probably just a little warmer.

The Radio Jove phased dipole antenna array.
Bob Haggard’s steps provide much easier access to the Communications Trailer.
Sunflowers were blooming everywhere.
The bunker antennas in their configuration right now.

During a break I got on the air at the bunker station, and made 12 contacts for QSO parties that were running: 1 to Hawaii, 5 to Ohio, and 6 to Kansas, on CW and SSB, on 20 and 40 meters. I submitted our logs to those QSO parties later.

The 5 band vertical ham radio antenna, still in good working condition after the repair from the May storm. Photo taken in the late morning soon after we arrived. We used this to make our 12 ham radio contacts on the 20 and 40 meter bands.

For the team, Gary Agranat.

Radio Telescope Site Report, System 1 Team, August 17, 2019, by Glenn Davis

Here is a quick site trip report on the work the System 1 team (Phil Gage, Lewis Putnam, Dave Molter and Glenn Davis) completed at the Haswell Site yesterday (8/17/2019):

  1. We installed Version 4.0 of the System 1 software. This version includes a major new capability that supports manual tracking of astronomical objects. I would like to demonstrate this capability at the next Science or Engineering meeting.
  2. Version 4 included a software update to fix the Elevation Axis Bounce Issue (Erroneous Elevation Axis Status) that was identified earlier this summer and has been investigated for several years. The problem was related to the Elevation Axis Integrity Instruments 232M200 I/O module. Due to a board related hardware problem, the I/O board was always reporting bit 2 of the encoder position data as “stuck” on (1) which would create erroneous Elevation encoder data. The fix required both a hardware and software modification. The hardware modification included moving the bit 2 pin to an unused position on the connector to the I/O module (see #3) then provide a software fix that would read data from this new bit position and re-incorporate the bit data back into the Elevation encoder position data – bypassing the bad bit. This hardware/software solution has fixed the problem. The Elevation Axis is now providing the correct encoder positions through it’s range of motion and the “bouncing” has been eliminated.
  3. Dave Molter moved and soldered the “bad” Elevation Axis hardware pin to support the software modification that fixes the Elevation Axis Bounce issue.
  4. Collected Voltage to Rate information for both axis – data below:
Voltage (V) Azimuth Rates (Degs/Sec) Notes
0.00 0.00 Minimum Potentiometer Setting
0.20 0.04
0.39 0.08
0.50 0.11 Normal Potentiometer Setting
0.75 0.17
1.50 0.33
Voltage (V) Elevation Rates (Degs/Sec) Notes
0.05 0.06 Minimum Potentiometer Setting
0.17 0.07
0.35 0.08
0.75 0.11
1.52 0.15 Normal Potentiometer Setting
3.72 0.30
4.24 0.34
5.00 0.42

Please note: We were unable to produce zero rates on the elevation axis – even with the potentiometer turn all the way down.

Additionally, though we believe we returned the potentiometers back to their normal positions, whoever returns to the site for the next data collection, please ensure the potentiometers are at their normal positions before use.

Glenn Davis