Download this title as PDF: Phased Array and Interferometry Basics
The multi-band feed provides new capability for the Deep Space Exploration Society. This system provides both radio astronomy and radio communications capability.
Radio Jove and SuperSID Data and Analysis Reports
Attached are the August reports for the Radio Jove, located at Plishner, and the SuperSID, which is located at my house.
1) The Radio Jove observing season is closing down with only an hour of observing time a day after sunset. We did get a couple of probable hits.
2) SuperSID did detect an M1.3 flare on 8 August. I also conducted a comparison of the Radio Jove results and the SuperSID results. I found no significant correlation between the two telescopes. The lightning storms this month also affected both telescopes by adding a lot of spurious signals.
I have been in contact with the Radio Jove NASA coordinator. He likes what we are doing and has provided information to improve our Radio Jove system.
Dr. Rich Russel
DSES VP and Science Coordinator
Plishner Radio SuperSID Results – July 2016
- Here is my analysis of the SuperSID Data: DSES SuperSID Results July 2016
- There were a number of C1+ flares last month.
- There was an M1.9 flare on July 24.
- The system is barely detecting C flares and rarely detects B flares.
- I plan on taking to Plishner – this should increase sensitivity.
Plishner Radio Jove Results – July 2016
- Here is my analysis of the Radio Jove data for July 2016 from the Plishner site: DSES Plishner Radio Jove Results July 2016
- There was a significant improvement in detection results this month. This corresponds to the new antenna cabling.
Dr. Rich Russel
Here is a Science Update on setting up Radio-Skypipe for your radio telescope data logging.
Feel free to contact me for help in setting up your radio telescopes.
Dr. Rich Russel
The Radio Jove system picked up lightning strikes very clearly on 20.1 MHz during the storm that passed through Colorado Springs on 29 May 2016, as evidenced by Figure 1. The second jpeg, Figure 2, is zoomed-in showing what lighting looks like on the strip chart.
As you can see, it is important to recognize if your radio telescope is detecting Jupiter or lightning.
Figure 1. Radio Jove data record of 5-29-16
Figure 2. Detail of Lighting data 5-29-16
Dr. Rich Russel
Radio JOVE Observations at the Plishner Radio Astronomy Observatory
Observational Period: February to April 2016
Analysis: Dr. Richard Russel
Radio Jove Configuration:
- 20.1 MHz Receiver
- Dual Dipole at 15 ft. oriented East-West with a 90 degree phase delay on South Dipole
- South dipole feed line was eaten through.
- North dipole feed line was damaged but intact – may have some degradation.
- Radio Skypipe software with an audio feed from receiver
- Latitude: 38: 45:28N Longitude: 103:16:50W
- Power was lost around 6 April – due to primary DC-AC inverter failing
- Note that the Sun has a dominant signature (Sunrise and Sunset times are documented)
- Very few Jupiter related signatures were noted for this time period. This was probably related to the damaged antenna.
Recommended Follow Up Actions:
- Compare Solar activity with Radio Jove activity. There appeared to have been enough gain on the antenna to get a good solar signature.
Results of the Radio Jove telescope at using the Plishner receiver from February to April 2016.
1) The damaged (eaten) antenna appears to have limited the Jupiter observations, however there is significant solar data.
2) The Data ends on 6 April due to the DC-AC inverter failure at the site.
3) We rebuilt the antenna on the 23 April trip. We will reinstall the receiver and the laptop on the next trip when we get the new inverter.
4) The data for all telescopes is being stored if anyone would like to use it.
I am currently analyzing the Meteor Scatter data from the Lyrid Meteor shower. Thanks to Ed Corn for setting up his system for meteor scatter.
Meteor Scatter Observations
Meteor showers happen when Earth’s orbit crosses the orbit of a comet or asteroid. The bits of dust and material remain after the comet or asteroid passes and the resultant meteor shower is a result of these particles entering Earth’s atmosphere.
The meteor leaves an ionized trail of material in the atmosphere that is highly reflective to a radio signal. An available ground based radio signal is the analog video television channel signal at 55.25 MHZ. The U.S. no longer broadcasts this frequency since the country went to digital television. However, it appears that there are a few signals being broadcast from Canada and Mexico.
- Receiver at 55.25 MHZ
- Antenna ( dipole or yagi at this frequency)
- Computer (Windows operating system with microphone or other audi input)
- Software – Radio Skypipe http://www.radiosky.com/skypipeishere.html
- Audio jumper from radio audio out to computer microphone in
- The atmosphere normally does not reflect the 55.25MHz signal. When the meteor enters the atmosphere, the signal does reflect off the ionization trail and is reflected back toward the ground. The signal sounds like a bell tone when received.
- Using the Radio Skypipe software, the signal spikes in amplitude and then reduces in a “shark Fin” geometry. This is caused by the meteor ionization trail degrading and therefore the reflected signal reduces gradually.
Skypipe will also allow the operator to count the number of meteors during a period of time. The below chart shows the results from last years Leonid meteor shower.
|Shower||Approximate Date||Parent Object|
|Quadrantids||January 3-4||Asteroid 2003 EH1|
|Lyrids||April 21-22||Comet Thatcher|
|Eta Aquariids||May 5-6||Comet Halley|
|Perseids||August 12-13||Comet Swift-Tuttle|
|Draconids||October 8-9||Comet Giacobini-Zinner|
|Orionids||October 21-22||Comet Halley|
|Taurids||November 5-6||Comet Encke|
|Leonids||November 17-18||Comet Tempel-Tuttle|
|Geominids||December 13-14||Asteroid Phaethon|
|Ursids||December 22-23||Comet Tuttle|
Contact Dr. Rich Russel for more information on setting up your meteor scatter radio telescope.
Plishner Radio Jupiter Astronomy Observations
The first long term observations at Plishner are based on the radio Jupiter system. The system utilizes a 20 Mhz dual dipole interferometer phased at 90 degrees toward the south. This enables the antenna system to improve gain toward the ecliptic in which Jupiter transits.
The radio telescope system is installed on a laptop at Plishner and remotely accessed via the internet. Below is the output of the system. It includes real-time monitoring of the 20 Mhz signal and the battery voltage of the battery system.
Plishner Radio Astronomy Jupiter System
All data is archived and is available to DSES members for use in research.
Contact Dr. Rich Russel for more information on accessing the collected data.