Meteor Scatter Rocks! – Work’in the Orionids

AB1OC 6m USA Grids

AB1OC 6m USA Grids

I’ve been pretty active on the 6m band the past few years. As you can see from the image above, we’ve worked most of the grid squares in the eastern third of the United States on 6m. I use a mix of modes on 6m including SSB Phone, CW, JT65, FT8, and MSK144. The addition of the MSK144 mode for Meteor Scatter contacts has been a lot of fun and has added some new grid squares to my total.

Orionid Meteor Shower Forecast

Orionid Meteor Shower Forecast

One of the fall Meteor Showers, the Orionids, occurred not too long ago and I decided to focus on MSK144 during the Orionids to see how many grid squares I could work. The shower mast most active over a 3-day period (Friday, Saturday, and Sunday).

MSK144 QSO with WA3LBI Using WSJT-X

MSK144 QSO with WA3LBI Using WSJT-X

The latest WSJT-X software supports a relatively new digital mode for Meteor Scatter contacts – MSK144. A Meteor Scatter contact made using MSK144 is shown above.

Meteor Scatter Pings Detected via MSK144

Meteor Scatter Pings Detected via MSK144

Meteors create short propagation enhancements when they burn up in the atmosphere. These short propagation bursts enable very brief (approximately 1-5 second) propagation on the 6m band.

The video above shows an example of an MSK144 Meteor Scatter QSO using WSJT-X.

6m MSK144 QSOs During Orionids

6m MSK144 QSOs During Orionids

So I bet you may be wondering how many 6m QSOs and grid squares was I able to work during the Orionids? I made a total of 23 Meteor Scatter QSOs using MSK144 during the 2017 Orionids. The image above shows the 16 grids that were worked using MSK144 during the three-day period. A few of these grids were new for me on 6m.

I used our Flex-6700 SDR, our SteppIR Yagis, and about 200w of power to make these contacts. It was a lot of fun making contacts using MSK144 Meteor Scatter on 6m. I am looking forward to future Meteor Shower activity!

Fred, AB1OC

Students Analyze HAB-2’s Flight Data – Nashua Area Radio Society

The HAB team members in NARS have created a five-session curriculum to teach physics, atmospheric science, and radio technology that we use as part of our HABlaunches. The last session is the most fun of all – analyzing the telemetry data from our HAB’s flight to see what the students can learn from it.

Source: Students Analyze HAB-2’s Flight Data – Nashua Area Radio Society

We got together with the students who did our HAB-2 launch this week to analyze the data from the flight and to preview some of the videos that HAB-2 captured during its flight. You can read more about what we learned from the flight data on the Nashua Area Radio Society website via the link above

Fred, AB1OC

HAB-2 Sets Altitude Record! – Nashua Area Radio Society

We flew our High-Altitude Balloon for the second time this past weekend. Our second High-Altitude Balloon Flight (HAB-2) was part of a STEM learning project that we did with STEM club students at Bishop-Guertin High School in Nashua, NH. The students did all of the flight prep and launched HAB-2 at approximately 11 am ET from a school in Winchester, NH. Parents, teachers and local students joined us for the launch as did several members of our HAB team.

Source: HAB-2 Sets Altitude Record! – Nashua Area Radio Society

Our students prepared, launched, and tracked HAB-2 this past weekend. Their HAB made it to almost 118,000 ft! You can read more about the launch and the flight on the Nashua Area Radio Society’s website via the link above.

Fred, AB1OC

HAB-2 Launch This Saturday – How To Track Our High-Altitude Balloon

Source: HAB-2 Launch This Saturday – How To Track Our High-Altitude Balloon

The Nashua Area Radio Society is planning to launch another High-Altitude Balloon (HAB) this coming Saturday, October 28th at 15:00z (11 am Eastern Time) from Winchester, NH USA. Our Balloon will carry a 2m APRS transmitter operating on 144.390 MHz and will be using the call sign N1FD-11. You can also track our HAB via the Internet using aprsi.fi. We expect our HAB’s flight to last about 2 1/2 hours and reach an altitude of over 105,000 ft. The balloon will also be carrying two video cameras to capture near-space video during the flight.

Our HAB launch is part of a STEM learning project with local High School students here in New Hampshire. You can read more about our project and see a video from our previous HAB launch and flight on our website here. We hope that you’ll track our HAB!

 

Fred, AB1OC

Raspberry Pi Satellite Rotator Interface

MacDoppler and GHTracker

MacDoppler and GHTracker

We’ve been using our Portable Satellite Station 2.0 for some time now and it works great. One area that can be improved is the interface between the MacDoppler Satellite Tracking program we use and the GHTracker application which controls the Green Heron Engineering RT-21 Az/El Rotator Controller in our setup. Our initial approach was to run the GHTracker app under Windows/VMWare on the same MacBook Air laptop that runs MacDoppler. While this approach works ok, it was more complex and less reliable than we had hoped.

Fortunately, the interface between MacDoppler and GHTracker uses a UDP-based interface which will run over an IP network.

GHTracker Running On A Raspberry Pi 3

GHTracker Running On A Raspberry Pi 3

Anita, AB1QB got great results using a Raspberry Pi 2 with a Touch Screen for her DX Alarm Clock Project so I decided to do something similar with GHTracker. The new Raspberry Pi 3 Model B boards feature a built-in WiFi networking interface and four USB ports which made the RPi 3 a perfect platform for this project. An email exchange with Jeff at Green Heron Engineering confirmed that GHTracker could be made to run under Linux on the Raspberry Pi (RPi).

We wanted a compact package that did not require anything but a power supply to run the final project. There are lots of great choices of parts to build a Raspberry Pi system. Here’s what we used:

Total cost for all of the parts was $120.

Assembly of the case and the hardware was straightforward. The folks at Adafruit provide a pre-built Jesse Linux image for the RPi which includes the necessary driver for the Touch Screen Display.

After a bit of configuration work and the creation of a few shell scripts to make it easy to boot the RPi to a HDMI display or to the Touch Display, we were ready to install the GHTracker App. we also enabled the VNC Server on the RPi so that we could use a VNC Client application on our MacBook Air in place of directly connecting a display, keyboard, and mouse to the RPi. Finally, we installed Samba on our RPi to allow files to be moved between our other computers and the RPi.

GHTracker Running on the Raspberry Pi

GHTracker Running on the Raspberry Pi

Jeff at Green Heron Engineering provided a copy of GHTracker V1.23 and the necessary serial interface library to enable its use on the RPi. Jeff is planning to make a tar file available with GHTracker and the library in the near future. We did some configuration work on LXDE (the GUI interface for Linux that runs on the RPi) automatically run GHTracker whenever the RPi is booted up. We also optimized the GUI for the sole purpose of running GHTracker on the Touch Screen Display. Finally, we configured the Ethernet and WiFi interfaces on the RPi to work with our home network and with our LTE Hotspot modem.

RPi GHTracker Test Setup

RPi GHTracker Test Setup

With all of the software work done, it was time to test the combination with our Satellite Rotator System. The setup worked on the first try using a WiFi network connection between the MacBook Air Laptop running MacDoppler and the RPi. The USB-based serial ports which control Azimuth and Elevation direction of the rotators worked as soon as they were plugged into the RPi. Also, the touchscreen interface works well with the GHTracker App making the combination easy to use.

MacDoppler and GHTracker via VNC

MacDoppler and GHTracker via VNC

The VNC Client/Server combination allows us to work with the software on the RPi right form our MacBook Air laptop. It also makes for a nice display for monitoring the GHTracker App’s operation from the Mac.

Thanks to the help from Jeff at Green Heron Engineering, this project was very easy to do and worked out well. The Raspberry Pi 3 platform is very powerful and relatively easy to work with. It makes a great start for many Ham Radio projects. Also, there is a wealth of online documentation, how-to information, and open source software for the RPi. I hope that some of our readers will give the RPi a try!

Fred, AB1OC

Orionid Meteor Shower: Friday Night Brings Excellent Conditions In Eastern US

Orionid Meteor Shower Forecast

Orionid Meteor Shower Forecast

One of the best meteor showers of the fall, the Orionid Meteor Shower, will peak on Friday night with over a dozen meteors streaking across the night sky every hour.

Source: Orionid meteor shower: Friday night to bring excellent viewing conditions in the Eastern US.

It looks like this weekend is going to be a good time to work Meteor Scatter contacts on 6m! The Orionid’s peak tonight (Friday) and tomorrow (Saturday) night, October 20th and 21st. We’ll be operating using WSJT-X MSK144 mode on 6m. We are planning to use our Remote Operating setup to take advantage of our SDR’s receiver capabilities and the connected 500w amplifier.

Fred, AB1OC

Remote Operating Enhancements

Updated Remote Operating Setup

Updated Remote Operating Setup

As explained in a previous article, we have been working on enhancing our FlexRadio 6700 based Remote Operating Setup to include additional remote control client options, better remote networking via the Internet, and better integration with our microHAM system.

Remote Operating Architecture

Remote Operating Gateway Architecture

This project involved the addition of the following capabilities to our base Remote Operating Setup:

These steps are now complete and we have some good results to share.

SmartSDR V2 Remote Connection

SmartSDR V2 Remote Connection

The first part of the upgrade was to update to SmartSDR V2. This upgrade enables much improved SmartSDR operation over the Internet. Our previous approach, which used a tunneled VPN connection combined with the previous versions of SmartSDR did not always perform well when used with low-bandwidth or high latency Internet connections. SmartSDR does much better in this area.

SmartSDR CAT Remote

SmartSDR CAT Remote

DAX Operating Remote

DAX Remote

 

 

 

 

 

 

 

 

 

 

 

Both the SmartSDR CAT and the SmartSDR DAX application have been updated to allow software on a PC being used to operate the FlexRadio SDRs over the Internet to gain access to CAT and sound interfaces associated with the radio.

FlexRadio Maestro Console

FlexRadio Maestro Console

We also added a Maestro Console to enhance the usability of the SDR radio portion of our Remote Operating Gateway. The Maestro is very easy to use and extends the available controls and display space which was limited when using just a laptop PC. The Maestro supports direct microphone connections for phone operation and also works with connected CW paddles for operation in CW mode. I have been using a single level paddle along with our Maestro as speeds of 22 WPM with full QSK. Sending CW at these speeds with the Maestro works well.

The Maestro has built-in WiFi and Ethernet connections and full support for SmartSDR V2’s connections over the Internet. The Maestro can operate from AC power or from an internal battery pack. I have a couple of spare rechargeable batteries for our Maestro to support longer operating sessions on battery.

TeamViewer VPN

TeamViewer VPN

We have been using a combination of TeamViewer Remote Control software and a router-based VPN solution to enable control of our antenna controllers and station power/amplifiers. This arrangement works well but most of our readers probably do not have a router which can support VPN connections or the networking knowledge to set up a secure VPN system.

A much simpler VPN solution can be realized by utilizing TeamViewer’s built-in VPN capability. You simply install TeamViewer on a PC in you shack which can access you station accessories and on your remote operating laptop or PC. You then enable TeamViewer’s VPN option and the configuration is complete.

TeamViewer VPN Connection

TeamViewer VPN Connection

We now use TeamViewer to set up both a VPN connection and a remote desktop control connection to a computer in our shack which can control amplifiers, power, and other station accessories associated with our Remote Operating Gateway We use TeamViewer in this way to control our microHAM Station Master Deluxe antenna controllers, RigRunner remote power controller, a microBit Webswitch device and an Elecraft KPA500 amplifier which are all part of our station’s Remote Operating Gateway.

DXLab Operating Remote

DXLab Operating Remote

With the addition of the SmartSDR and the updated TeamViewer/VPN setup, we can operate our station remotely over the Internet. We have tested our setup using a Wireless Hotspot modem and Verizon’s LTE service. The combination of our PC running the DXLab Logging Suite and the Maestro work great in this configuration.

We have found the need to initialize the networking configuration in a specific order to get everything running correctly. The steps that we use are as follows:

  1. Connect the laptop PC to the Internet
  2. Bring up the TeamViewer VPN connection
  3. Run SmartSDR on the laptop PC and login to SmartSDR Remote
  4. Bring up the DXLab’s Suite including Commander (currently, DXLab’s Commander has some issues connecting when the FlexRadio protocol is used. We have found that the KENWOOD protocol works fine.)
  5. Bring up the remote control application for the Elecraft amplifier and access our RigRunner power controller and microBit Webswitch units to turn on accessories as needed
  6. Initiate a second TeamViewer Remote Control connection and use it to run the microHAM remote antenna controller in a single window
  7. Shutdown SmartSDR on the laptop PC and bring up the connection to the radio via the Maestro.

There is obviously still some room for simplification in this initialization procedure. I expect that some simplification will come as all of the software involved becomes more mature and is further adapted for remote operation.

Once initialized properly, its simple to use the PC and Maestro combination to work SSB Phone or CW contacts. The DXLab Logging Suite will follow the radio, track modes, handle split operation, and allow control of our antenna rotators via DXView. We can click on spots in DXLab’s SpotCollector to automatically set the FlexRadio SDR’s mode, frequency, and split configuration. The Maestro and DXLab will stay in sync during tuning, mode changes, and other radio operations.

Remote Digital Operation using WSJT-X and FT8

Remote Digital Operation using WSJT-X and FT8

The final part of this project was to add the latest Version of the WSJT-X software to our Remote Operating client laptop PC to enable FT8 operation on the HF bands and MSK144 for Meteor Scatter work on 6m.

SmartSDR and JTAlert Supporting Remote FT8 Mode

SmartSDR and JTAlert Supporting Remote FT8 Mode

We do not use the Maestro for digital operation. We leave SmartSDR running on our remote laptop PC instead. We also use the JTAlert application to create an automated bridge between WXJT-X and the DXLab Logging Suite.

The combination of SmartSDR V2 and WSJT-X work great remotely. We have used this combination to make quite a few FT8 contacts on the HF bands as well as several Meteor Scatter contacts on 6m using MSK144 mode.

These enhancements to our Remote Operating Gateway have helped both Anita and me to operate more. I have our Maestro either in my home office or on a table in our kitchen where we can listen to the bands and work DX when the opportunities come up. Remote Operating, even its just from another room at your QTH, is great fun!

We should be able to begin the next step in our station upgrade plans – the addition of an Elecraft KPA1500 shared amplifier, in the near future. The new amplifier will enable our Remote Operating Gateway to operate at legal limit 1500w out on the HF bands and 6m.

Fred, AB1OC