DSES Science Meeting March 22, 2021

Welcome to the DSES Science meeting 3/22/2021.

by Bill Miller

We had 14 participants in the virtual science meeting today:  Thanks everyone for joining.

Participants: Dr. Rich Russel,  Ray Uberecken, Bob Haggart, Floyd Glick, Gary Agranat, Myron Babcock,Dan Layne, Edward  Currie, Jon Ayres, Tim Cline, Don Latham. Lewis Putman, Bob Sayers, Bill Miller

Also see the Zoom Video Recording for more detail:  

Topic: DSES Science Meeting,  Date: Mar 22, 2021 05:26 PM Mountain Time (US and Canada)

https://us02web.zoom.us/rec/share/WmQScWFaV2DH22cSW9CAnYJgjhMsYpHDCmyt39GC-BFhJoCtqjNfg2n1bxpNC-U.FJAeQcMiaKhBY2Bw

Chat File from Meeting: http://dses.science/wp-content/uploads/2021/03/meeting_saved_chat.pdf

Agenda and Notes.    

  1. Myron’s Treasure’s Report: Checking: $2627.70 Savings: $5742.33. 34 current paid up members that include 5-life members and 1-student membership. Please pay your yearly $50 for full voting membership or $20 for interest only membership on Pay-Pal on the web site or by check to Myron at our Austin Bluffs address. Web site and PO box
    $130 box rent are coming due. Utility bill was about $58 last month
    Mail: Deep Space Exploration Society
    4164 Austin Bluffs Parkway #562
    Colorado Springs, CO 80918
  2. Have Larsen Hess is a new member from Fairbanks on Myron’s list.
  3. Myron is in contact with Larry Ludlow of the Fairbanks Gilmore NOAA tracking center employee and the deputy director of Mars Rover missions at JPL and another JPL employee and will try to get them connected with the DSES.
  4. BOD nominations were made, the election was held, but only 11 ballots were returned and received.
  5. Election results and officer assignments will be made by the new board at the all members virtual meeting which we agreed to schedule on April 12th in lieu of the normal engineering and ops meeting . Bill will organize and send an invitation to all members.
  6. Virtual Open House Presentation
    a. Front Range 6 Meter Group. President, Paul Sobon sobonpaul(at)gmail.com asked for a DSES presentation on Wed., Feb 10th at 7PM. Please view Bill’s presentation of the “Virtual DSES Open House” recorded from the Front Range 6 Meter Group at http://dses.science/dses-presentation-to-the-front-range-6-meter-group. This prompted invitations to give the presentation to several other amateur groups.
    b. Bill and Myron gave the virtual live Open House presentation to the Artic Amateur Radio Group based in Fairbanks on March 12th c. Bill was invited and gave the Open house presentation to the Utah DX Amateur group on March 17th to about 28 members.
    d. Bill was also invited and gave the presentation to the Oregon Tualatin Valley Amateur Radio Club on March 18th to about 38 Members.
  7. The ARRL has published the results from the 2020 EME moon bounce contest last autumn, which we participated in. Gary wrote a short post on the website about this, with links to further information.
    a. Gary mentioned last month, we were contacted last month by Rick Rosen K1DS, who was writing an article for QST about the contest. He included a segment in the article just about us. Gary attached the article that is now being published and attached the certificate we were awarded.
    b. In the post Gary explained a little how the scoring worked. We were credited with contacting 36 unique stations, which gave us a score of 90,000. And that put us in 4th place in the Multi-operator, all-mode, 1.2 GHz category.
    c. The Stanford University station W6YX, which we contacted, placed highest in our category, with 113 contacts. The highest number of contacts in the contest results was by a single-operator Eastern Russian station with 388 contacts, over several bands and modes. Gary suspects there is a higher density of EME stations in Europe, which can enable this kind of performance.
    d. Our operators for the contest were AA0L, KL7YY, and WA2JQZ. Glen Davis also was crucial for adjusting our antenna pointing system and ensuring we were operational. (WD0CUJ and Michael Namieka and Bill Miller KC0FHN also came out, and made a moon bounce test transmission, but didn’t make contest contacts.)
    e. The post on our website includes the Certificate and the QST article. ARRL 2020 EME Contest Results – Deep Space Exploration Society (dses.science)
  8. Here is the pdf for in DSES pubs tab for 9 ft dish
    20-Preliminary-Drift-Scan-Survey-using-the-New-9-foot-Dish-Neutral-Hydrogen-Measurement-System.pdf (dses.science)
  9. Our Site is photogenic!
    a. Don Savage and Jason Fazio did an all-nighter at the site on March 17th. They would like to do an onsite class in night photography at the site need to work this through the board.
    b. Andrew Miller, another photographer based out of Denver would like to do a project on the site
    c. Marc Slover and Michael Rice compiled the time-lapse videos.
    https://www.youtube.com/watch?app=desktop&v=HLrpsVmBchE&feature=youtu.be
  10. BOD Initiative
    In 2019 and 2020 we accomplished a lot of the big goals that we had been working on for a number of years including (H1) Hydrogen Line mapping, Tropospheric scatter communications, Pulsar detection, and EME. Now that we have those accomplishments and can replicate them at will, we should look ahead and decide what we do next. Everyone should think of a radio astronomy or organization project that they think would be doable and important and get those into a list that we can review and go after with some more detailed plans. The main categories of interest would be:
    a. New observation initiatives
    b. Ham Radio capabilities, contesting and special events
    c. On site open house for Aug 2021
    d. Continued Infrastructure upgrade and maintenance.
    e. Instrument and electronics upgrade and additions.
    f. Scientific discovery, theory testing, and publication.
    g. Educational programs and events for members and students.
    h. Public outreach and member recruitment
  11. There is an upcoming Schriever STEM Day on April 23rd from 2:00 pm to 6:00 pm. This may be an opportunity to gain some new members and is an excellent outreach opportunity if we can get an invitation. Gary will check into it to see if we can get an invitation.
  12. Dr. Rich Russel’s Science presentation with Ted Cline’s graphical conversion and analysis of SpectraCyber data from Rich’s 9 ft backyard dish. Click on to view. Watch the meeting video for discussion.
    DSES Science Meeting 3-22-2021.pdf:
    http://dses.science/wp-content/uploads/2021/03/DSES-Science-Meeting-3-22-2021.pdf
    End of meeting

ARRL 2020 EME Contest Results

Reported by Gary Agranat WA2JQZ.

DSES participated in the ARRL Earth-Moon-Earth (EME) moon bounce contest last autumn. The contest was spread over 3 weekends. We participated in the weekend segments of October 10-11 and November 28-29. The ARRL has now posted the contest results.

We operated solely the 23 cm (1296 MHz band) with our 60-foot dish antenna. We used CW Morse Code and SSB Phone on the first weekend, and CW and Digital JT65 on the second weekend. We made 50 contacts over the two weekends. However, for contest scoring, stations we contact again over both weekends only count once. Therefore for scoring, we were credited with 36 contacts. Our team consisted of several operators: AA0L, KL7YY, WA2JQZ, and KC0HPN. Glen Davis also was crucial for adjusting our antenna pointing system and ensuring we were operational. (WD0CUJ and Michael Namieka also came out, and made a moon bounce test transmission, but didn’t make contest contacts.) And so we submitted our contest log in the All Mode, Multioperator, 1.2 GHz category, with our call sign K0PRT. Worldwide we came in 4th place in this category.

ARRL posted the results on this PDF file. EME-2020-FinalQSTResults.pdf (arrl.org). They also have an interactive page, Contest Scores (arrl.org).

In addition, we were contacted last month by Rick Rosen, K1DS. He wrote an article for QST about the 2020 ARRL EME contest, and he included dedicated segment of the article just for DSES. The article is here: 2020 EME Contest – Final Results – Version 1.1 (arrl.org)

Our posts about our participation in the contest:

Our 1st DSES Earth-Moon-Earth (EME) Moon Bounce Communications – Deep Space Exploration Society

DSES Succeeds in our 2nd EME Moonbounce Communications Competition – Deep Space Exploration Society

DSES Science Meeting Nov 23, 2020

Welcome to the DSES Science meeting 11/23/2020

2020-11-23 DSES Science Meeting Notes, by Bill Miller

We had 16 participants in the virtual science meeting today:  Thanks everyone for joining.

Participants: Dr. Rich Russel,  Ray Uberecken, Lewis Putman, Bob Haggart, Don Latham, Floyd Glick, Gary Agranat, Glenn Davis, Jay Wilson, Jon Ayers, Lauren Libby, Myron Babcock, Robert Sayers, Ted Cline. Jerry Espada, Bill Miller

Agenda and notes;

Also see the Zoom Video Recording for more detail:

https://us02web.zoom.us/rec/share/3mwT_OSBrUV6KMi8GTTrcFaiG77Jmuuke72Jk1zmmUDpSrO2nAY3jFx49_muRz5I.7GK8PFSy5Vs-kL4R?startTime=1606177717000

Agenda and notes:

  1. Myron’s Treasure’s Report Checking $1774.28. Savings $5742.15. We have 49 paid members.
  2. Science Fair: 
    • Bill spoke with Carol Bach the coordinator,  she replied, “The Pikes Peak Regional Science and Engineering Fair will be held virtually on February 20, 2021.  We are hoping that the Deep Space Exploration Society will again sponsor a special award or awards at the fair.  In addition, we are hoping you or another member of your group will consider being a special awards judge.  We will send you a code to unlock a showcase with digital displays that you can view.  Virtual judging will take place between February 18-20, 2021.”
    • Bill to send board DSES Special awards criteria for approval.
    • “Please respond by December 2, 2020 to this email and confirm that your organization is planning to participate. Also, please let us know the name and contact email for future communications.”
  3. Planet Walk:
    • Bill will write an endorsement letter and have the DSES Board modify and approve for Planet Walk Colorado Springs. See https://www.planetwalkcs.org/
  4. Arecibo Failure:
    • See Bob Haggard’s repost on the Arecibo Radio Telescope status.
  5. Rich presented the DSES Science part of the Meeting:  See all notes in the DSES Science Meeting Power Point. http://dses.science/wp-content/uploads/2020/11/DSES-Science-Meeting-11-23-20.pdf
  6. Ray
    • Problem with the 1296 feed last trip.  Took down the Feed amplifier and found that the unit was stuck in the transmit configuration again due to a failed FET in the Relay driver.  Fixed this and added more gate protection circuitry to solve the problem. 
    • Also had a bad diode and a bad cable that had to be corrected.
    • The FT-736R Keyer connection failed on last trip but Ray fixed it.
    • Tried CW EME but couldn’t hear the echo.
    • Did receive Rays Home Based beacon bounced off Pikes Peak and verified pointing so the receiver chain is working.
  7. Gary Underground K0PRT  bunker station summary report.
    • FT8,  PSK Reporter website showed our station was received on 40 meters during afternoon in CA and TX.
    • 15M operation was hot
    • Our rare grid square (DM88) attracted many Japanese stations
    • Vertical working well on 15 and 40 meters. 10 meters was tried and at least had good SWR, but band was dead.
    • Yagi was also working well to Japan
    • PSK reporter showed good coverage on 15 meters all around the Pacific Rim.
    • See more in Rich’s slides above
  8. Glenn says that Phil is working on an elevation tracking update that will need some onsite testing when ready.
  9. Much discussion about the SDR receivers, GNU SW and the computer power needed to run them.  See the meeting recording for too much detail to capture here.

Plishner site trip summary of 2020-10-31:

Written summary and photos by Bill Miller.

Ray Uberecken and Bill Miller went to the Plishner site on Sat. October 31.

Ray brought back his EME 200 Watt amplifier box that he had removed on the previous weeks trip.  The unit had blown a relay control FET that kept the unit in the transmit position so it would not connect the feed to the receiver.  Ray and Bill donned climbing harnesses, scaled the scaffold, and installed the amplifier before the wind could start blowing about 11:00 AM at the site. 

Ray also brought back the FT 736 Transceiver after repairing the seized tuning knob.  He brought in a computer and an audio interface with JT-65 HF software loaded.  This will enable digital mode EME on the next contest  EME 50-1296 MHz — November 28-29, 2020.  In addition, he installed  an extra 1296 MHz 18 Watt auxiliary amplifier between the FT736 10W max output  and the Amplifier at the feed point.  This extra amplifier will enable the full power of the linear amp at the feed.  Both the 18 watt amp and the 200 watt feed point amp are enabled with the Key circuit from the FT 736.  

There is an extra power supply on the bench to power the 18 Watt amp and the key circuit to the feed amp is attached with the terminal block on the rack.

Ray also brought back the Electronic Keyer and Paddle for the FT736 moon bounce CW mode.

Once all this equipment was installed, we climbed the tower and replaced the bad swivel joint on the down feed coax with a short segment of very flexible RG8X cable to allow the cable wrap. Because this is the same impedance as the main hard line coax and very short it has insignificant loss to the signal.

We then called Myron Babcock to test the equipment.  We pointed the dish at Colorado Springs and at first did not hear his signal.  He swung his antenna around to point at Pike’s Peak and we did the same and established communication on 1296.1 MHz with clear copy.  This proved the overall system viability.  

Bill set up his phone app and computer program for aiming the Hughes Net dish for internet.  After using the compass to point the dish to the apps specified Azimuth and Elevation and working the dish around for half an hour, we still couldn’t get the modem to lock up and receive the satellite.  More research is needed to make sure we are trying for the correct satellite and have the right coordinates and tools to do the alignment on the next trip. Once we have the Hughes Net system working, we should have high speed internet capability for a number of uses.

Ray has been working on his new radio Astronomy receiver based on a medical signal preconditioner and a stable amplifier/integrator and A/D converter.  The receiver will give a greater bandwidth than current SDRs with  up to 100MHz of bandwidth.

A conversion program is needed to convert the comma delimited tabular output of the A/D to the .Fil file format for radio astronomy.  Ray installed the receiver and checked its operation.

We stowed the dish, shut everything down, removed the trash and locked the site.  Note that the new service  position on the scaffold after the recalibration of the pointing system is 314.5 deg. All old bearings for Beacons and such should be adjusted by -2.5 deg.

You can read a PDF version of this report here: 2020-10-31-Plishner-site-trip-summary-v2-.pdf

Our 1st DSES Earth-Moon-Earth (EME) Moon Bounce Communications

By Gary Agranat, with Myron Babcock and Glenn Davis. Videos by Bill Miller.

Friday evening at sunset as the team prepares for our first EME attempt overnight. Photo by Gary Agranat.

On Saturday October 10, 2020 we succeeded in making our first Earth-Moon-Earth (EME) Moon Bounce communications. We succeeded at our first attempt. This accomplishment was several years in the making, thanks to the work of many members, past and present.

We did this participating in the annual ARRL EME contest held on the weekend of October 10-11, 2020 GMT. (That’s Friday 6 pm to Sunday 6 pm local time.) The frequencies available for this contest were in the ham radio bands from 50 to 1296 MHz. We used our 60-foot dish antenna at Haswell, CO, with a 1296 MHz feed with dual circular polarization, installed 2 weekends earlier.

[ Installing the 1296 MHz feed for Autumn Moon Bounce Communications, Sept 27 ]

EME Moon Bounce communications is directing a signal to the Moon. The Moon’s surface simply reflects the signal back to Earth. If the Moon is above your horizon, if you have suitable equipment, and if you know enough about what to do, it would be possible for you to receive the signal and communicate back. You could communicate to your neighbor or across continents. The signals, however, are extremely weak, having to travel back and forth the Earth-Moon distance, over 238,000 miles. EME generally requires efficient directional antennas to sufficiently increase the signal gain. Amplifiers can be used too. And the antennas have to point to the Moon. Also, radio signals sent through the ionosphere experience a rotation in their polarization. And there is some effective rotation from other causes, including from the changes in orientation from the Moon and from operating on different points of the Earth’s globe. Our solution is to circularly polarize our signals. And also, there is a Doppler shift between transmitted and received signal, mostly due to the Earth’s rotation, causing a difference in velocity between the Moon and our location on Earth. All of these are challenges to deal with.

Our 60-foot dish antenna at sunset as we started preparations. Photo by Glenn Davis.

Our team for the EME operation were Ray Uberecken AA0L, Myron Babcock KL7YY, Gary Agranat WA2JQZ, and Glenn Davis. Bill Miller KC0FHN also came on Saturday morning.

The team arrived Friday evening October 9, while we still had daylight, to set up and test. Testing included making pre-arranged tropospheric scatter contacts, which were successful. We also attempted to complete set-up of a Hughes Internet antenna, to give us Internet access, but that was not successful. We instead sometimes connected to the Internet using cellphones. Although the contest began at 6 PM local time, we had to wait for the moon to rise above the horizon. Moonrise for us was at about 11:30 PM local time, and the Moon was above our horizon until about 2 PM local time the next day Saturday. We chose to stay for just this one Moon pass, and not continue through Sunday, in order to not knock ourselves out on this first attempt.

After we completed our testing, we relaxed until we were ready to start. Looking outside, we had an exceptionally deep starry sky. We could see the Milky Way clearly arching overhead through Cygnus. Jupiter and Saturn were bright to the south, and Mars was very bright, rising in the east. Glenn Davis experimented with his camera and took some nice time exposure photos with the dish antenna, the stars, and the Milky Way.

Photo by Glenn Davis. (Click to enlarge.)
Our 60-foot dish antenna with the Milky Way. Jupiter and Saturn are brightly visible to the left of the antenna. Photo by Glenn Davis. (Click to enlarge.)

I (Gary) meanwhile got some rest. This enabled the others to get some rest later in the morning while I continued.

Myron KL7YY wrote and emailed an update about our operations to the DSES membership on Saturday morning at around 4 AM. It provides a good narrative of how we were doing until that point, and his update follows next:

* * * * * * * * * * *

Summary of DSES first attempt at EME, Earth Moon Earth, contacts using the 60 foot dish:

On Friday evening, October 9 we started with a few nearby Tropospheric Scatter contacts around 7 PM with DSES member KL7IZW, Steve in Monument, CO, and W6OAL Dave in Parker.  Around 9 PM we talked to N0YK in Scott City KS, These contacts ranged from 110 to 130 miles and confirmed that our system was working.

 When the moon came over the horizon at midnight we tried to listen to the ON0EME moon beacon in Belgium but couldn’t hear it.  About 45 minutes after moon rise we started to hear JT-65 digital signals. 10-15 minutes we started to hear CW signals.  Glenn Davis made a few corrections to the tracking program and signals increased in strength.  At times it sounded like a 20 meter CW contest pileup with all the loud signals bouncing off the moon all across 100 KHz of band (1296.0 to 1296.1 MHz).  After about 90 minutes without hearing our own signal we rechecked the power to the amplifier at the feed horn and everything appeared to be normal.  A few moments later we finally heard our own signal 2.5 seconds later on CW off the moon and the Belgium Moon Beacon.  I made several calls on SSB and heard our echo really loud.  We went back to CW and Gary proceeded to start making CW contacts. The first almost contact, a German station, abruptly dropped out so no official contact was completed.  Our first official station worked on CW was with OH2DG in Finland.  England was next followed by Italy, Poland, Denmark, Sweden and with DSES member Skip Macaulay, VE6BGT, in Alberta Canada.. Also made our first voice SSB contact with him as well.  Seems that with every new contact we make it is with a new European country.  In order to correct for Doppler shift and with no RIT we are changing VFO’s from Receive to Transmit by several KHz or more.  Lots of CW signals being heard and we still have 12 more hours of moon to bounce signals off of… We are hearing our own echo and we have lots of hours to go. We plan on Digital mode later in the day but for now there are more than enough signals to hear on CW. 

Our Moon bounce station consist of an older Yaesu FT-736R with 10 watts feeding almost 180 feet of half inch hardline into a 200 watt amplifier at the antenna feed horn.  The receiver pre amplifier is a 30+db gain with a noise figure of minus .35.  Our Effective Radiated Power (ERP) is over 6 million watts. 

* * * * * * * * * * *

We operated with our club call sign K0PRT.

A short video of Myron KL7YY calling CQ. You can hear the echo of his signal coming back from the Moon a couple of seconds later. (Video length 35 seconds)

K0PRT-2020-10-10%2010.24.25.mp4

Because the signals are extremely weak, and there can be fading, there is a standard protocol for exchanging messages for EME contacts. This is intended to ensure as much of the message as possible can be copied and acknowledged on both sides. The basic format is simple, and one repeats a lot. One first exchanges call signs, then the signal reports, and then finally if that worked, an acknowledgement all that was copied correctly. If one only completes part of the contact, one should still log that, as that is an accomplishment. If using Morse Code, the standard is to send at 15 words per minute, but spacing out the characters longer than usual. The faster sending and spacing is to help one copy complete characters if there is fading. If one misses a character, one still has a high chance to get the character with the many repeats.

In order to have the proper frequency offset for the Doppler shift, we referenced the WSJT 10.0 software, at the suggestion of Steve KL7IZW. The software has an astronomical data section that calculates and displays the frequency offset. The higher the frequency, the more significant the offset. At 1296 MHz we had a difference of as much as 3 KHz between transmit and receive frequencies. The software also displays other useful data like local Moon rise and set times (based on Grid Square location).

The WSJT 10.0 software also can be used for JT65C digital EME communication. However, we didn’t figure out how to configure that in time with our setup, and so we didn’t do any digital contacts this time. We could tell we were hearing JT65 signals. They were present from 1296.05 to 1296.1 MHz, and we almost always could hear those signals while the Moon was up.

Glenn stayed up until about 3 AM, when we were sure our antenna azimuth alignment was correct and would continue to point accurately to the Moon. His work was invaluable in troubleshooting the azimuth offset, which turned out to be about 1.5 degrees, and honing in on the Moon once we heard CW signals.

Glenn Davis working with the antenna pointing. Photo by Gary Agranat.
The 60-foot antenna pointing east, for the tropospheric scatter test to N0YC in Kansas. Later we would point east again, to prepare for where the Moon would rise. Photo by Gary Agranat.
Myron making a tropospheric scatter SSB phone contact during testing, with Glenn Davis setting the antenna pointing. The scene was similar when me made SSB phone contacts during the EME contest. Photo by Gary Agranat.
Myron, Glenn, and Ray. Ray was looking for the ON0EME beacon after the Moon rose. Photo by Gary Agranat.

Since the Moon rises in the east, our signal paths at first are to the east. That is to Europe and the North American east coast. As Myron mentions, once we started receiving the signals, we were hearing many European stations, and we were busy. Through the morning we made 14 contacts to Europe, to 8 European countries. We also made the contact to our DSES member Skip Macaulay VE6BGT in Alberta, Canada, on CW and then phone. W4OP in North Carolina, hearing us on SSB, then gave us a call on SSB too.

Ray AAOL brought a CW keyer that can send Morse Code with either a keyer paddle or a keyboard. It can store pre-programmed messages, like a CQ call. I (Gary) decided to use the keyer paddle, as that gave me more flexibility — I could quickly adjust for conditions — and I felt more comfortable as I am used to the key.  Meanwhile, it seemed to me also that some of the CW contacts we made used software to send their messages.  Those didn’t have good spacing between words or call signs.  And that made copying slightly more challenging. A keyboard though can enable any of us to send, even if we don’t have practice sending Morse Code. Most of the contacts we made were with CW Morse Code.

This short video shows part of a Morse Code CW contact by Gary WA2JQZ. XE1XA in Mexico called CQ. We responded by sending our call sign K0PRT several times. Then K (the invitation to respond) several times. When we switch the VFO from the transmit to the receive frequency, you can hear the last part of our signal coming back, reflecting from the Moon, several seconds later. You then here the signal from XE1XA, also coming back reflecting from the Moon. He transmitted back our call sign as K0PRN, instead of K0PRT. We afterwards replied sending our callsign again, only, to give him the correction. That’s why we repeat a lot, and send sections of the message just one at a time. We completed the contact successfully. If you look carefully on the transceiver, you will see we switched about 2 KHz down from the transmit to receive frequency. (Video length 1:16)

K0PRT-2020-10-10%2011.07.09.mp4

At around 6 AM, when the Moon was high enough so that we no longer had a path to Europe, we took a break for breakfast and to rest.

Just before sunrise. Photo by Gary Agranat.
Tracking the Moon during early morning. Photo by Gary Agranat.

In earlier discussions we thought we might have many more contacts across the Pacific and to the North American west coast, when the Moon was sufficiently to the west. But it turned out we had very few contacts that way. We made just two contacts to Japan. Our first was at about 9 AM local time, to JH1KRC. Our second was three hours later to JA6AHB. Instead we made a few more contacts to the US, a few to Canada, and one to Mexico. These other stations we heard were searching around too. That led me to believe that if there were any other signals out there, we likely would have heard them.

Our contacts included: 

  • K2YUH Alan Katz in NJ, who runs the 432 MHz and Above newsletter: http://www.nitehawk.com/rasmit/em70cm.html
  • W5LUA Albert Ward in TX, who some in our group know for EME.  (He at first thought I was Ray, when I contacted him on CW.  Myron then contacted him on SSB.)
  • W6YX, the Stanford University radio club, which was using a 28 foot dish.  We contacted them first on CW.  Then later when Bill was looking to record a phone QSO, which would illustrate the signal delay from the transit time to the Moon and back, W6YX just happened to call CQ on SSB on the frequency we were tuned to.  We then had about a 4 minute QSO on SSB with them, which Bill recorded.

A video of Gary WA2JQZ responding to W6YX at Stanford University and having a 4 minute SSB QSO. (Video length 4:38)

K0PRT-2020-10-10%2012.30.38.mp4

We operated until about noon. We made 30 contacts in all.  25 contacts were CW (Morse Code) and 5 were SSB phone.  4 of the 5 phone contacts were with stations we also had CW QSOs with.

We submitted our contest log to ARRL the next day.

In the judgement of all of us, we had a very good EME operation. We are very pleased it worked so well on the first attempt. We clearly have a capable EME station.

Glenn and his team are continuing to follow up to investigate why we had a 1.5 degree azimuth offset.

It still takes my breath away to hear the echo of our signal coming back from the Moon, a couple of seconds later. The speed of light isn’t just a value in the books, it is something you experience viscerally first hand. It is real. EME is the longest signal path we have for communicating with others. This is fun.

These are the contacts we made. (CW = Morse Code, PH = SSB phone. Given also are the date and GMT times, the signal reports, and the other stations and their locations):

CW 10/10/2020 750 K0PRT 559 DL0SHF 559 Germany
CW 10/10/2020 756 K0PRT 559 OH2DG 579 Finland
CW 10/10/2020 805 K0PRT 559 G3LTF 579 England
CW 10/10/2020 814 K0PRT 549 I5MPK 569 Italy
CW 10/10/2020 846 K0PRT 569 SP6JLW 589 Poland
CW 10/10/2020 900 K0PRT 559 DL4DTU 559 Germany
CW 10/10/2020 912 K0PRT 579 SM4IVE 589 Sweden
CW 10/10/2020 919 K0PRT 549 DG5CST 569 Germany
CW 10/10/2020 934 K0PRT 559 VE6BGT 579 Alberta, Canada
PH 10/10/2020 947 K0PRT 57 VE6BGT 56 Alberta, Canada
PH 10/10/2020 947 K0PRT 55 W4OP 57 North Carolina, USA
CW 10/10/2020 1034 K0PRT 549 OK1KKD 569 Czech Republic
CW 10/10/2020 1043 K0PRT 599 OE5JFL 599 Austria
CW 10/10/2020 1049 K0PRT 579 W6YX 589 California, USA
CW 10/10/2020 1103 K0PRT 569 IK2MMB 569 Italy
CW 10/10/2020 1111 K0PRT 579 OZ4MM 599 Denmark
CW 10/10/2020 1149 K0PRT 549 OK1CS 579 Czech Republic
CW 10/10/2020 1153 K0PRT 569 OK2DL 479 Czech Republic
CW 10/10/2020 1201 K0PRT 559 VE6TA 579 Alberta, Canada
CW 10/10/2020 1503 K0PRT 559 JH1KRC 569 Japan
CW 10/10/2020 1526 K0PRT 549 AA4MD 559 Florida, USA
CW 10/10/2020 1533 K0PRT 569 WA9FWD 559 Wisconsin, USA
CW 10/10/2020 1540 K0PRT 569 W5LUA 579 Texas, USA
PH 10/10/2020 1547 K0PRT 569 W5LUA 579 Texas, USA
CW 10/10/2020 1652 K0PRT 539 VA7MM 559 British Columbia, Canada
CW 10/10/2020 1703 K0PRT 559 XE1XA 559 Mexico
PH 10/10/2020 1731 K0PRT 55 VE6TA 55 Alberta, Canada
CW 10/10/2020 1740 K0PRT 569 K2UYH 559 New Jersey, USA
CW 10/10/2020 1806 K0PRT 549 JA6AHB 569 Japan
PH 10/10/2020 1826 K0PRT 54 W6YX 55 California, USA

And these are summaries of our contacts from the logging program:

K0PRT’s Contest Summary Report

 Total Contacts = 30

 Operating Period: 2020/10/10 07:50 – 2020/10/10 18:26

 Total Contacts by State \ Province: AB 4, CA 2, TX 2, BC 1, FL 1, NC 1, NJ 1, WI 1. 8 total.

Total Contacts by Country: USA 8, Canada 5, Czech Republic 3, Federal Republic of Germany 3, Italy 2, Japan, 2, Austria 1, Denmark 1, England 1, Finland 1, Mexico 1, Poland 1, Sweden 1. Total countries 13.

 Total Contacts by Continent: Europe 14, North America 14, Asia 2. Total continents 3.

Photo by Bill Miller.

-72/73 Gary WA2JQZ

Addendum: QSL confirmations we received:

Installing the 1296 MHz feed for Autumn Moon Bounce Communications

Text and photos by Gary Agranat.

A DSES team worked at the Plishner Radio Telescope site in Haswell on Sunday September 27, 2o2o. Team members were Ray Uberecken, Floyd Glick, and Gary Agranat. We accomplished the main objective, to install a new 1296 MHz feed at the focus of the 60 dish antenna. We also installed a mast in the ground, on which will later be added a Hughes Internet satellite antenna. Two friends of Ray’s came out and did an immense service by using metal detectors and magnetic rollers to clear nails and other metallic debris on the site. We changed out two of the locks. And we inspected the bunker.

Mast for Hughes Internet antenna

Ray and I met at the Plishner site at 0930 in the morning. 

We first installed a sturdy pipe mast behind the operations trailer, on which will be mounted a small satellite antenna to access the Hughes network geosynchronous satellite for Internet access.  Ray chose a spot that will not be blocked by the trailer or the 60-foot antenna.  We mixed cement and set the pole in its hole with the cement, using a level to check that the mast is vertical.

Moon Bounce (EME) Preparation

After that we manually rotated the 60-foot dish antenna to the service platform. I figured out, with Ray’s help and the checklists, how to use the software to monitor the antenna pointing. (Note: we might want to add a checklist just for this type of procedure, for using the software for just manual antenna pointing, as when we service the antenna.)

Floyd came out to the site by 1030. Ray and Floyd climbed the service platform. I worked on the ground to move feeds and tools up and down to them. We replaced the 408 MHz feed at the antenna focus with the newly built 1296 MHz feed. The 1296 MHz feed was built by KL6M, to specifications provided by Steve Plock (KL7IZW). The feed mount at the dish focus was designed by Ray, to enable the feed to more easily rotate out and be changed.

Conditions were somewhat windy, with a cold front coming, but still manageable. By the afternoon the winds had picked up enough that we postponed any further work at the feed. Work that still needs completion is installation of a 200 Watt amplifier at the feed. Since we are planning to operate at 1296 MHz from the Operations Trailer, which has a long coax hard line path to the pedestal and antenna feed, we expect significant power loss from the long path. We therefore need to boost the power again at the feed. We plan to install the amplifier the next weekend. We then also intend to test our setup by trying tropospheric scatter communications to the north.

We are planning to use this configuration to operate EME (Earth Moon Earth) Moon Bounce communications. And specifically we plan to participate in the ARRL EME contests on October 10-11, 2020 and on November 28-29, 2020 (UTC).

We discussed our plans for the upcoming contest in 2 weekends. The Moon then will be at last quarter phase. What that means is that it will rise on Friday night a little before midnight (about 1130 PM), and set Saturday a little after 2 PM. That means we will prepare to do overnight and morning operations. After the Moon rises we will try to pick up the ON0EME beacon in Belgium. We can try to contact across the Atlantic Ocean. The US East Coast will be in night time conditions, and so we anticipate less contacts to there. Daytime conditions, when more hams would be awake, are more favorable for the US West Coast, and across the Pacific Ocean to Oceana, Asia, and Australia.

Note that the 60-foot antenna will be configured with the 1296 MHz feed through the end of November. This will be an opportunity to try using it for other 1296 MHz communications, including troposphere scatter.  

Metal souring of the site

A friend of Ray’s who works at Planet Granite Ryan, and his brother, Rob, came out to the site also.  They have ground metal detectors and magnets on rollers, and systematically paced across the site to pick up nails and other small metallic debris.  They did pick up lots of nails, including along the roadway. They spent a few hours with us, and left after lunch. They did us a great service by helping remove a lot of this debris.

Combination Lock and Bunker Inspection

We attempted to open the combination locks at the gate, the bunker, and the generator shack. After still having difficulty, we replaced the locks at the gate and bunker, with the locks Myron Babcock obtained for us. These are similar model locks, and the combinations were kept the same.

We had a report that the bunker had been flooded by two successive rain storms in July. We opened and inspected the bunker. The bunker was dry, though the floor had more-than-normal dust and dirt, and some tiny debris was spread here and there. It will require a fresh cleanup before normal use. We saw no indication of mold from dampness.

Tumbleweeds were accumulated again at the ramp entrance.

We completed our activities by early afternoon, about 3 PM.

For the team, – Gary

We kept the antenna steering in manual configuration. We opened the System 1 steering software to monitor the position angles as we manually steered the antenna to the service platform.
We noted this radio interference at the site on our scope. This scan is from 0 to 1.8 GHz. The higher floor noise level at the left is from the sensitivity of our 408 MHz feed, which was still on the dish antenna, before we changed it out.
The 60-foot antenna is positioned for service.
Ray brought two feeds for the 60-foot antenna. This is Ray showing Floyd the 4 GHz feed, which we will use in the future, to calibrate the pointing position with geosynchronous satellites.
Floyd carrying the 1296 MHz feed to the antenna for installation.
The inside of the 1296 MHz feed. It is designed as a septum feed, with separate channels on each side for left and right circular polarization.
Rob with a metal detector, crisscrossing the site, picking up small metal debris.
Ray and Floyd on the 60-foot antenna service platform, starting work.
Removing the cover.
Ray is disconnecting the 408 MHz feed, so that it can rotate down and out for changeout.
The 408 MHz feed is now rotated down. It is connected simply by the shaft to the mount, for easier changeout.
Installing now the 1296 MHz feed. Its design doesn’t use a shaft, but instead will be securely fastened to the mounting frame.
Ryan using a metal detector on the west side of the site.
Our view towards the west. High clouds in the distance are an indication of a cold front gradually coming this way. We experienced steady windy conditions as the front approached..
Closing up.
Our view of Haswell in the distance. The clouds from the front were getting closer. By the time we left in mid-afternoon, the clouds were over us, but we had no precipitation.
The 1296 MHz feed installed.
We installed this ground mast. It will mount a small satellite antenna, to connect to the Hughes Internet network.