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Dec 16

Mine just arrived from Amazon. It was shipped from Nooelec. They are available. Jim HNRAO --

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Mine just arrived from Amazon. It was shipped from Nooelec. They are available. Jim HNRAO --

Dec 16

Stephen Arbogast

Dec 16

Richard Feynman Cargo Cult

https://www.youtube.com/watch?v=RtR_ECkqblg

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Richard Feynman Cargo Cult

https://www.youtube.com/watch?v=RtR_ECkqblg

Dec 16

Ayushman Tripathi, … Stephen Arbogast62

Dec 16

Cantenna feed dimensions & SDR comparison for H-line

From Marcus Leech a simple single pole infinite impulse response filter works for me...... On Tuesday

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Cantenna feed dimensions & SDR comparison for H-line

From Marcus Leech a simple single pole infinite impulse response filter works for me...... On Tuesday

Dec 16

Eduard Mol, … fasleitung310

Dec 16

Possible new water maser flare in W49

Very interesting! Usually I only observe the bright features at -20- 30 km/s because my SDR has only

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Possible new water maser flare in W49

Very interesting! Usually I only observe the bright features at -20- 30 km/s because my SDR has only

Dec 16

andrew....@googlemail.com, … Brad Thomas4

Dec 16

Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice?

A simple modification for a long can would be to make a copper or brass plate close in size to the

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Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice?

A simple modification for a long can would be to make a copper or brass plate close in size to the

Dec 16

Mike Otte, … Conrad Cardano7

Dec 15

Geminids very active

Hi I recorded meteors at 55.239 MHz. I see others at recorded meteors at 54.309 MHz. I will try that

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Geminids very active

Hi I recorded meteors at 55.239 MHz. I see others at recorded meteors at 54.309 MHz. I will try that

Dec 15

andrew....@googlemail.com

Dec 14

Peak of the Geminid Meteor Shower 2025 @ LRO

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Peak of the Geminid Meteor Shower 2025 @ LRO

Dec 14

Kimmo, … duncan campbell-wilson18

Dec 13

Ku-band LNB with external reference: good for interferometry ?

I would bury the cables in the ground a meter down inside a conduit where the diurnal delta T is

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Ku-band LNB with external reference: good for interferometry ?

I would bury the cables in the ground a meter down inside a conduit where the diurnal delta T is

Dec 13

Andrew Thornett

Dec 12

Beginners guide to Linux for radio astronomers: How to open virtual environment in Ubuntu called ezra-env

Perhaps some of you are at that stage in your radio astronomy journey where you are trying to get

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Beginners guide to Linux for radio astronomers: How to open virtual environment in Ubuntu called ezra-env

Perhaps some of you are at that stage in your radio astronomy journey where you are trying to get

Dec 12

cgd, … Robert Meade36

Dec 12

JA_IFAvg2csv_IFavg2.8_01Jun2501 Right Ascension Problem

Robert here from R3, I'm currently iterating on that 140mm number which was optimal for SNR to

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JA_IFAvg2csv_IFavg2.8_01Jun2501 Right Ascension Problem

Robert here from R3, I'm currently iterating on that 140mm number which was optimal for SNR to

Dec 12

Stephen Arbogast, Alfred Aburto2

Dec 12

CH3OH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array: Distinct Outgassing Behaviors and a Remarkably High CH3OH/HCN Production Rate Ratio

Methanol! How did that happen is the question! > On 12/11/2025 9:14 PM, 'Stephen Arbogast'

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CH3OH and HCN in Interstellar Comet 3I/ATLAS Mapped with the ALMA Atacama Compact Array: Distinct Outgassing Behaviors and a Remarkably High CH3OH/HCN Production Rate Ratio

Methanol! How did that happen is the question! > On 12/11/2025 9:14 PM, 'Stephen Arbogast'

Dec 12

Andrew Thornett

Dec 12

Possible good stainless steel pot for making cantennas for hydrogen line

I've found these on Amazon and ebay - this price is currently available on Amazon. 160mm diameter

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Possible good stainless steel pot for making cantennas for hydrogen line

I've found these on Amazon and ebay - this price is currently available on Amazon. 160mm diameter

Dec 12

Dec 9

Elemental Hydrogen Velocities at Dec: -30

Convert to Galactic Long and use this chart

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Elemental Hydrogen Velocities at Dec: -30

Convert to Galactic Long and use this chart

Dec 9

Jan Lustrup, … flavio camacho31

Dec 8

My Interfeometer sutup

Thanks so much that the stuff we newbe need. On Monday, December 8, 2025, 'b alex pettit jr'

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My Interfeometer sutup

Thanks so much that the stuff we newbe need. On Monday, December 8, 2025, 'b alex pettit jr'

Dec 8

Dr. Rich Russel

Dec 7

RTOP Dec 2025: Masers, Interferometry, Hybrid Optical/radio Telescope RTOP Dec 2025: Masers,

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RTOP Dec 2025: Masers, Interferometry, Hybrid Optical/radio Telescope RTOP Dec 2025: Masers,

Dec 7

Dr. Rich Russel

Dec 7

Fw: SARA Radio Telescope Observation Party (RTOP) Sunday 1900 UTC

RTOP starts at top of hour. Rich ----- Forwarded Message ----- From: SARA <pres@radio-astronomy.

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Fw: SARA Radio Telescope Observation Party (RTOP) Sunday 1900 UTC

RTOP starts at top of hour. Rich ----- Forwarded Message ----- From: SARA <pres@radio-astronomy.

Dec 7

Andrew Thornett, … Cathal O'Donghaile11

Dec 7

Fw: [Nooelec] Re: Nooelec SAWBird H1 LNA Barebones

For anyone in Europe looking for this, amazon.de have 1 X barebones and 11 X the cased version in

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Fw: [Nooelec] Re: Nooelec SAWBird H1 LNA Barebones

For anyone in Europe looking for this, amazon.de have 1 X barebones and 11 X the cased version in

Dec 7

JERRY TAYLOR, Alex P2

Dec 6

IF Average in the latest version of SDR#

This ? https://github.com/AP-HLine-3D/HLine3D/blob/main/21cm_Step2A_Software_Links_AirSpySDR%23_IFavg

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IF Average in the latest version of SDR#

This ? https://github.com/AP-HLine-3D/HLine3D/blob/main/21cm_Step2A_Software_Links_AirSpySDR%23_IFavg

Dec 6

Andrew Thornett

Dec 6

Retired astronomers

Now I am officially retired, here are some retired astronomer jokes.... Here are 20 astronomy-themed

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Retired astronomers

Now I am officially retired, here are some retired astronomer jokes.... Here are 20 astronomy-themed

Dec 6

Andrew Thornett, Alex P2

Dec 5

Losses at mast head

The Value of intentionally degrading the performance of the System by adding noise from an option not

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Losses at mast head

The Value of intentionally degrading the performance of the System by adding noise from an option not

Dec 5

Jon Abel, Marko Cebokli2

Dec 4

Signal Freqeuency & polarity collation in a fractal array - versus dish-based, pre-summed analysis.

Hello Jon! The dish is of course polarization sensitive, the polarization which it receives, is

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Signal Freqeuency & polarity collation in a fractal array - versus dish-based, pre-summed analysis.

Hello Jon! The dish is of course polarization sensitive, the polarization which it receives, is

Dec 4

Dr. Rich Russel, … Dimitry UA3AVR4

Dec 4

SARA Journal - Call for papers/presentations/observations

Excellent! Thanks Dimitry On Thursday, December 4, 2025 at 08:38:20 AM MST, Dimitry UA3AVR <ua3avr

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SARA Journal - Call for papers/presentations/observations

Excellent! Thanks Dimitry On Thursday, December 4, 2025 at 08:38:20 AM MST, Dimitry UA3AVR <ua3avr

Dec 4

cgd, b alex pettit jr15

Dec 4

21cm H Drift Scan Dec -15 RA 14.5 to 19.8

A few files from the RA0600 time frame

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21cm H Drift Scan Dec -15 RA 14.5 to 19.8

A few files from the RA0600 time frame

Dec 4

Jan Lustrup, … Eduard Mol26

Dec 3

Could Jupiter be detected with an interferometer?

Hi Wolfgang and all, The flux density in that paper was apparently calculated for a standard distance

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Could Jupiter be detected with an interferometer?

Hi Wolfgang and all, The flux density in that paper was apparently calculated for a standard distance

Dec 3

Conrad Cardano, … b alex pettit jr13

Dec 3

Thank you, Andy. I have been looking at ezRA for the last few days. The 3D image is interesting.

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Thank you, Andy. I have been looking at ezRA for the last few days. The 3D image is interesting.

Dec 3

Alex P, Andrew Thornett9

Dec 3

Discovery Dish Enhancement Test

Not sure that posted properly

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Discovery Dish Enhancement Test

Not sure that posted properly

Dec 3

Nathan, … Tyrone Bradford10

Dec 2

Point-to-point radio link

Im a microwave network engineer but I focus more on implementation than design. I am not as familiar

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Point-to-point radio link

Im a microwave network engineer but I focus more on implementation than design. I am not as familiar

Dec 2

Eduard Mol, … Jim Sky20

Dec 2

interferometer simulations and FFT analysis

Hi Jan, That is a good clue. I will try to make the calculations work either way, comma or period.

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interferometer simulations and FFT analysis

Hi Jan, That is a good clue. I will try to make the calculations work either way, comma or period.

Dec 2

Don Latham, Stephen Arbogast2

Dec 2

Uh oh! Does this mean that inhabitants of Earth are now in more trouble? On Tuesday, December 2, 2025

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Uh oh! Does this mean that inhabitants of Earth are now in more trouble? On Tuesday, December 2, 2025

Dec 2

Conrad Cardano, … Mike Otte18

Dec 1

Did I just detect a meteor

I listened to a bunch of hiss on 54.310 mhz and recorded these meteors. Don't get you hopes up,

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Did I just detect a meteor

I listened to a bunch of hiss on 54.310 mhz and recorded these meteors. Don't get you hopes up,

Dec 1

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