[TangerineSDR] Notes from PSWS / TangerineSDR call of 06-29-2020

Dr. Nathaniel A. Frissell Ph.D. nathaniel.frissell at scranton.edu
Mon Jun 29 23:16:06 EDT 2020

Hi all,

Here is the recording: https://scranton.zoom.us/rec/share/y5JWL-np8mROTc_jtAL5Y746HaS0aaa82iZP-foEz0kkCX2vngQo-b5LhGxrEUgs

73 de Nathaniel W2NAF

On Jun 29, 2020, at 10:37 PM, Tom McDermott via TangerineSDR <tangerinesdr at lists.tapr.org<mailto:tangerinesdr at lists.tapr.org>> wrote:

Notes from PSWS / TangerineSDR call of 06-29-2020

1. Dave Whitten has updated his magnetometer code based on feedback from Dr. Hyomin Kim. It seems to be progressing well. Dave Larson is generating data files from the code.

2. Dan is working on scripts to install WinHPSDR, WSJT-X, and Gnuradio for Raspberry Pi 3 and 4. They compile/build in different directories. Dan is using a 32G SD card. Gnuradio takes 3-1/2 hours to natively (ARM) build on R-PI-4 and 6 hours on R-PI-3.

3. Bill has (Raspberry) PiHPSDR generating IQ UDP packets in TangerineSDR format and is able to consume and use that data. The R-PI clock has too much wander to be usable for precision measurements.

4. Rob has a full SQL database working for his WSPR spot database, including a Grafana client available. To SQL query the wsprnet.rog database goto:  http://wsprdaemon.org/timebasedb.html  The site also has a link to Tutorials.

5. Jonathan is looking at a 3 or 4 channel very low frequency (VLF) receiver based on a soundcard audio codec chip (as ADC) and an interface to provide receiver interface and time-stamping.  He has developed a requirements document. VLF-RX-Tools is an open source software package currently being used to capture VLF data from a soundcard being used as part of a receiver.

6. Scotty is still awaiting libraries for his selected Intel FPGA (dash 6). The CAD layout person has started building the CAD libraries for the FPGA and other parts for the Data Engine.

7. Nathaniel discussed and showed example plots from analysis of WSPRNet and RBN spots. He discussed skip-zone and some solar flare effects. Some of the papers are on or linked from the hamsci.org<http://hamsci.org/> webpage:

Presentations from CEDAR 2020 are linked on the conference website:

Nathaniel's Contest University (CTU) presentation gives a wide overview.

-- Tom, N5EG

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