This autumn Dr. Richard Russel attended the Very Large Array (VLA) Imaging course in Socorro, New Mexico. The course taught how to take the data sets from multiple large interferometer antenna systems and produce images and science statistics.. This post presents the slides from the DSES Science Meeting on November 25, 2019. This is an update from Dr. Russel’s posts on the topic from October 19 and 31.
Dr. Russel also presents his September 2019 results of Hydrogen 21 cm (HI) drift scan measurements at his newly installed 9-foot dish antenna at his home in Colorado Springs.
Please click the link to view the illustrated pdf file:
As we do each third weekend of the month, we had a scheduled work day at our DSES Plishner radio astronomy antenna site in Haswell, Colorado. Our members who participated on this weekend were Steve Plock, Ed Corn, Ray Uberecken, and Gary Agranat. Work objectives were:
Completion of installing the antennas and cables on the new 50 foot ham radio antenna tower.
Servicing the 60-foot dish antenna feed.
I will save discussion of the 60-foot antenna feed for the Engineering Meeting minutes. That work was done by Steve Plock and Ray Uberecken. In this post I will describe the work we completed for the 50 foot tower.
For our 50-foot tower work, we installed a second vertical antenna for normal contacts on the 2-meter VHF band. This gives us a second 2-meter band capability, independent of our already existing 2-meter band talk-in radio. We then installed coax cables for both of the 2 meter band antennas on the tower.
We also serviced the 80 and 160 meter band dipole antennas that the tower supports: 1) We replaced some of the nylon rope that lifts the dipole antennas to their deployed positions. Previously we had connected shorter pieces of rope and knotted those together. But the knots stuck in the pulleys, and we therefore replaced those with longer sections of rope without knots. 2) We neatened the arrangement of the wire antennas supported by the tower.
Captions to the photos provide more detials of the work.
After we serviced the ham and radio astronomy antennas, Steve made us lunch by smoking beef sausage in the grill. That was served with coleslaw and potato salad. Gary also brewed coffee.
After lunch I did some ham radio operating using the tri-band Yagi, and also the using the 80 and 160 meter dipoles. With the tri-bander, I first made a phone contact to Hawaii on 15 meters, before the bands got busy with the ARRL sweepstakes. Then I operated FT8: on 15 meters I mostly contacted South American stations (lots of Brazil), plus some US stations when they were there (including North Carolina and Montana). On 20 meters the band opened across the Pacific. We had many calls to us from Japan. Perhaps they saw our profile on QRZ, or perhaps they noticed our rare grid square. Also across the Pacific, we made two contacts with South Korea, one with mainland China, one with Indonesia, and one with Australia. The band became weaker for US and Canadian contacts, but we did have some of those too. I alternated going to 80 meters, and had a few more domestic contacts there. These were with our K0PRT station callsign. Later I also used my callsign, on 20, 80, and 160 meters. 160 meters had noise at the FT8 frequencies. But I went to the upper portion of that section of the band, which was just slightly better. I managed 4 contacts on 160 meters, to as far away as Kentucky. I would say our antennas were working well.
Within a few days we received a number of e QSL confirmation cards.
Ray left after lunch. Ed and Steve left before sunset. Steve tested the range of the new talk in radio antenna on the tower as he and Ed drove home away from the site. We had good contact to as far away as Sugar City. At JRs in Ordway, we could hear each other, but Steve needed to turn off his squelch. And at that point there were some slight dropouts. But we could still communicate. That is a great improvement for our talk-in system. Gary stayed and operated the ham station until a little after dark, and then closed up and departed too.
To all Deep Space Exploration Society (DSES) Current and Former Members:
November marks the start of our 2020 membership dues drive. Our organization relies on annual membership dues to fund most all of the DSES projects at our Paul Plishner Radio Astronomy and Space Sciences Center near Haswell, CO. Annual dues for voting members, continues to be $50.00. For those who wish to be involved as non-voting members the price is $20.00. Annual elections of board members/officers will be in February. You must be current on your dues to vote in these elections.
You can pay your dues on the DSES web site (DSES.science) by credit card or PayPal to email: dsestm(at)gmail.com. You can also mail dues to the following addresses: DSES, 4164 Austin Bluffs Parkway, Box 562, Colorado Springs, CO 80916-0562. Your canceled check, Paypal receipt or credit receipt will be your acknowledgement of your dues paid. If you want a separate receipt signifying payment, please note that with your payment and I will mail you a receipt. PLEASE INCLUDE YOUR CURRENT MAILING ADDRESS, EMAIL ADDRESS AND CONTACT PHONE NUMBER. Let me know if you DO NOT want this info to be released to the general membership. I would like to pass this membership information containing email addresses and phone numbers out to all members. ” And don’t forget to review all the latest reports, work trips and science studies on the DSES.Science website to see all that the organization has accomplished with the help of your dues.”
If you have any questions concerning your membership status, please feel free to email, text, or call me.
Recently Dr. Richard Russel attended the Very Large Array (VLA) Imaging course in Socorro, New Mexico. The course taught how to take the data sets from multiple large interferometer antenna systems and produce images and science statistics.. This post is an update from Dr. Russel’s post on this topic on October 19.
In this post, Dr. Russel also presents initial results of Hydrogen 21 cm (HI) drift scan measurements at his newly installed 9-foot dish antenna at his home in Colorado Springs.
Please click the link to view the illustrated post: