Re: [HamSCI] Digest for hamsci@googlegroups.com - 1 update in 1 topic
13 views
Skip to first unread message
David Goncalves
Nov 10, 2025, 11:54:42 AM (6 days ago) Nov 10
to ham...@googlegroups.com
This shouldn’t be necessary if one sets up a good timing source for the computer being streamed to and tagging the data as it streams in, in the same way that one can do with xmidas , or perhaps with GNURadio and SigMF. It’s certainly less of a pain to extract and obviates from RF-watermarking the data.
On Sun, Nov 9, 2025 at 10:12 PM <ham...@googlegroups.com> wrote:
- Tangerine SDR/PSWS? - 1 Update
Terry Bullett <terry....@noaa.gov>: Nov 09 05:52PM -0700
Phil,
I fully endorse the concept of some kind of station ID being encoded on oblique HF sounding. Back in to 80's it was impossible to do this. I am involved with a network of oblique sounding in East Asia using 2010 era VIPIR radar systems, and station ID is done by a complicated and restrictive sounding schedule. The key to doing this is not compromising the measurement statistics.
Cheers,
Terry
On 11/6/25 07:57, Phil Erickson wrote:
Hi Steve,
To add a bit more to the picture, when the timing synchronization idea emerged - essentially encode the time sync in a modulated RF input on a center frequency well separate from the main science frequency band - I briefly pointed out to the group that we have been doing this same sort of technical approach for the Millstone Hill production software radar system for at least 15+ years now; it was Frank Lind's original idea for us. In our case, it is used not as a PPS (the Ettus hardware does that) but as a metadata tag, which when demodulated identifies an ID telling the system which transmit waveform is being sent in an individual radar pulse. However, the principle works much the same. It will work in the end, and Nathaniel can describe the successes already achieved in the testing he's done.
It's a way in software to do what the SDR hardware was doing, and the additional compute load is not very big on today's processing platforms. Elegance!
73
Phil W1PJE
On Thu, Nov 6, 2025 at 9:10 AM Dr. Nathaniel A. Frissell Ph.D. <nathaniel...@scranton.edu> wrote:
Hi Steve,
Yes, I completely agree with the time synchronization. We have people working on a solution that will inject a PPS from a 2-port LeoBodnar directly into the signal from the antenna. This marker will be recorded with the rest of the data, allowing for the precise timing to be recovered in data processing.
73 de Nathaniel
From: ham...@googlegroups.com <ham...@googlegroups.com> on behalf of Steve Kaeppler <steve.k...@gmail.com>
Date: Thursday, November 6, 2025 at 9:07 AM
To: ham...@googlegroups.com <ham...@googlegroups.com>
Subject: Re: [HamSCI] Tangerine SDR/PSWS?
WARNING: This message originated from a source outside of the university.
Dear Nathaniel-
Thank you for the update. I know we talked about this at CEDAR to
some degree, but it sounds like if I wanted to make a PSWS at this
point the best way would be to buy a RX888 and Leo Bodnar, install
ka9q radio and get help as needed from Rob Robinett on setting up the
wspr daemon. I will just add that the ka9q software seems to be
pretty powerful and I suspect if a lot of channels could have IQ data
saved off individually that would be a great way to be able to record
a lot of the HF spectrum.
I will continue to advocate that whatever is developed with the
RX888-ish hardware should incorporate time synchronization to PPS.
From my non-exhaustive testing of SDRs, the only ones that can do this
are the Ettus radios and the HackRF One. Finally, as you probably
know the Ettus N2XX radios are now deprecated, so while you can get
them on the used market, they are not being manufactured anymore.
Anyway, I look forward to more updates as they come.
Regarding AGU, I believe I will miss you unfortunately! If I go, I
will only be there on Wednesday and Thursday.
Thanks and 73,
Steve
AD0AE
On Thu, Nov 6, 2025 at 8:16 AM Dr. Nathaniel A. Frissell Ph.D.
> You received this message because you are subscribed to the Google Groups "HamSCI" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to hamsci+un...@googlegroups.com.
> To view this discussion visit https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgroups.google.com%2Fd%2Fmsgid%2Fhamsci%2FBN7PR03MB4403C165CE175098731BC47DF2C2A%2540BN7PR03MB4403.namprd03.prod.outlook.com&data=05%7C02%7Cnathaniel.frissell%40scranton.edu%7C1cf42b4c5452463584d508de1d3dbf99%7Ca8edc49a41f14c699768a7f6d7c3b8c3%7C0%7C0%7C638980348219915203%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7 C0%7C%7C%7C&sdata=k92wmLf8oWt3GdSH1e9Pe%2BGVQpU2hAPTj%2FnUDp1A6L0%3D&reserved=0.
--
--------------------------------------------------------------------
Steve Kaeppler
steve.k...@gmail.com
cell: 262-707-0932
Amateur Radio Call: AD0AE/6
--
Please follow the HamSCI Community Participation Guidelines at https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fhamsci.org%2Fhamsci-community-participation-guidelines&data=05%7C02%7Cnathaniel.frissell%40scranton.edu%7C1cf42b4c5452463584d508de1d3dbf99%7Ca8edc49a41f14c699768a7f6d7c3b8c3%7C0%7C0%7C638980348219944162%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=Bc6BPO01Ge4uMQ4T%2BP4WvAN31fYvXezTgyplqpakZbk%3D&reserved=0.
---
You received this message because you are subscribed to the Google Groups "HamSCI" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hamsci+un...@googlegroups.com.
To view this discussion visit https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgroups.google.com%2Fd%2Fmsgid%2Fhamsci%2FCANK6cPrgE-s2wvne9WZb6hNOMocXPPeUf%253Do5bUQVGSBvkTf1Bg%2540mail.gmail.com&data=05%7C02%7Cnathaniel.frissell%40scranton.edu%7C1cf42b4c5452463584d508de1d3dbf99%7Ca8edc49a41f14c699768a7f6d7c3b8c3%7C0%7C0%7C638980348219975369%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata= 6WAbWpOlKsUPXPwPaX%2F7hBaab9gZvpaR3vN4gQZjtqc%3D&reserved=0.
Please use your best judgment when opening attachments, clicking links, or replying to this email. If you suspect this is a phishing attempt, please forward to inf...@scranton.edu. Other questions can be directed to the Technology Support Center at (570) 941-4357 or techs...@scranton.edu.
--
Please follow the HamSCI Community Participation Guidelines at http://hamsci.org/hamsci-community-participation-guidelines.
---
You received this message because you are subscribed to the Google Groups "HamSCI" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hamsci+un...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/hamsci/BN7PR03MB4403EDB8ACF61307B070B46CF2C2A%40BN7PR03MB4403.namprd03.prod.outlook.com.
--
----
Phil Erickson
phil.e...@gmail.com
--
Please follow the HamSCI Community Participation Guidelines at http://hamsci.org/hamsci-community-participation-guidelines.
---
You received this message because you are subscribed to the Google Groups "HamSCI" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hamsci+un...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/hamsci/CAAZaqEtGW_mRdN4j6QFQo28hJZXTTwhE8kqOfPPwgZD1W0froA%40mail.gmail.com.
--
Dr. Terry Bullett WØASP
NOAA National Centers for Environmental Information (NOAA/NCEI)
Cooperative Institute for Research in Environmental Sciences (CIRES)Terry....@noaa.gov 720-446-9775 (google voice) 978-337-9092 (cell)
"Life is Complex. It has a Real part and an Imaginary part."
You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page.
To unsubscribe from this group and stop receiving emails from it send an email to hamsci+un...@googlegroups.com.
Rob Robinett
Nov 10, 2025, 3:58:49 PM (6 days ago) Nov 10
to ham...@googlegroups.com
Paul WB6CXC and Scott N5TNL have developed a 80 MHz GPS driven time signal and injector which is demoduled and detected by Scott's software which we are about to test at the WWV WD-DASI receive site. The wav files recorded by the system have timing accuracy limited by the bandwidth of the 10+ KHz demodulated time signal.
That project was inspired by Phil's description of his system, and our goal is to incorporate it into all WD-DASI sites.
Rob
To view this discussion visit https://groups.google.com/d/msgid/hamsci/CAJggkNUjgn1-5Sx_R%2BL5-M8ZoQbfnvqaZev1AOtiiNMHiP9%2B_Q%40mail.gmail.com.
HL Serra
Nov 10, 2025, 5:03:04 PM (5 days ago) Nov 10
to ham...@googlegroups.com
Cool, Rob.
valuable for correlating radio telescopes connected for interferometry
(nanosecs)?
Cheers, Larry
On Mon, Nov 10, 2025 at 12:58 PM Rob Robinett <r...@robinett.us> wrote:
>
> Paul WB6CXC and Scott N5TNL have developed a 80 MHz GPS driven time signal and injector which is demoduled and detected by Scott's software which we are about to test at the WWV WD-DASI receive site. The wav files recorded by the system have timing accuracy limited by the bandwidth of the 10+ KHz demodulated time signal.
>
> That project was inspired by Phil's description of his system, and our goal is to incorporate it into all WD-DASI sites.
>
> Rob
>
> On Mon, Nov 10, 2025 at 8:54 AM David Goncalves <da...@w1euj.com> wrote:
>>
>> This shouldn’t be necessary if one sets up a good timing source for the computer being streamed to and tagging the data as it streams in, in the same way that one can do with xmidas , or perhaps with GNURadio and SigMF. It’s certainly less of a pain to extract and obviates from RF-watermarking the data.
>>
>> On Sun, Nov 9, 2025 at 10:12 PM <ham...@googlegroups.com> wrote:
>>>
>>> ham...@googlegroups.com Google Groups
> To view this discussion visit https://groups.google.com/d/msgid/hamsci/CADO0QiYYh_wHSp2uP3NoQK7ciNMyB7ffVTP%3Djm5_7yLs7aWYfw%40mail.gmail.com.
>The wav files recorded by the system have timing accuracy limited by the bandwidth of the 10+ KHz demodulated time >signal.
What will that accuracy translate to in actual use? Will it be
valuable for correlating radio telescopes connected for interferometry
(nanosecs)?
Cheers, Larry
On Mon, Nov 10, 2025 at 12:58 PM Rob Robinett <r...@robinett.us> wrote:
>
> Paul WB6CXC and Scott N5TNL have developed a 80 MHz GPS driven time signal and injector which is demoduled and detected by Scott's software which we are about to test at the WWV WD-DASI receive site. The wav files recorded by the system have timing accuracy limited by the bandwidth of the 10+ KHz demodulated time signal.
>
> That project was inspired by Phil's description of his system, and our goal is to incorporate it into all WD-DASI sites.
>
> Rob
>
> On Mon, Nov 10, 2025 at 8:54 AM David Goncalves <da...@w1euj.com> wrote:
>>
>> This shouldn’t be necessary if one sets up a good timing source for the computer being streamed to and tagging the data as it streams in, in the same way that one can do with xmidas , or perhaps with GNURadio and SigMF. It’s certainly less of a pain to extract and obviates from RF-watermarking the data.
>>
>> On Sun, Nov 9, 2025 at 10:12 PM <ham...@googlegroups.com> wrote:
>>>
>>> ham...@googlegroups.com Google Groups
Reply all
Reply to author
Forward
0 new messages