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Welcome to the Grape list - Active 2021-2025 (now closed, please see its replacement, hamsci-psws)

This mailing list was used for discussion among the designers, builders and hosts of the Low-Cost Personal Space Weather Stations (PSWS), the Grape 1 and Grape 2, which cleverly used WWV and other time standard stations to perform ionospheric measurements. Much success was had, especially during the 2023 and 2024 solar eclipses across North America. Note that over 50 Grapes are still functional, collecting and uploading data on a daily basis.

This list has been replaced by the hamsci-psws list as of June 2025. Please join hamsci-psws if you are interested in the GRAPE* or the other instruments that make up the HamSCI Personal Space Weather Station. This list, closed to new postings, will remain 'read only', and in the public realm.

73!

*GRAPE = Great Radio Amateur Propagation Experiment

0 selected

Gary Mikitin, AF8A

Jun 19

Migrating hamsci-grape to hamsci-psws

Hello members of the hamsci-grape Google Group: This group has served its purpose well (discussions

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Migrating hamsci-grape to hamsci-psws

Hello members of the hamsci-grape Google Group: This group has served its purpose well (discussions

Jun 19

Rachel Boedicker, … David G. McGaw4

Jun 11

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 ET tomorrow morning. Please

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HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 ET tomorrow morning. Please

Jun 11

May 31

Grape 2 Unit 1013 - preswap.sh failed

Sorry...clearly I included the wrong screen shot. Correct screen shot attached here.... Regards, Kent

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Grape 2 Unit 1013 - preswap.sh failed

Sorry...clearly I included the wrong screen shot. Correct screen shot attached here.... Regards, Kent

May 31

Jonathan, Nabin Poudel2

May 19

Call for Local Web Interface Developers for the DASI2 VLF System

Jonathan, I'm interested, I am a full stack developer. Please let me know the details. Sent from

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Call for Local Web Interface Developers for the DASI2 VLF System

Jonathan, I'm interested, I am a full stack developer. Please let me know the details. Sent from

May 19

Rachel Boedicker

May 15

No PSWS Telecon Today

Hello Everyone, There will not be a Grape/PSWS telecon today. Happy Hamvention and 73, Rachel AC8XY

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No PSWS Telecon Today

Hello Everyone, There will not be a Grape/PSWS telecon today. Happy Hamvention and 73, Rachel AC8XY

May 15

Gary Mikitin, AF8A

May 8

Minutes, 8 May 2025 PSWS Operations Zoom

Here's a brief wrap-up of the 8 May, 2025 PSWS Operations Zoom call. ~13 in attendance. (The

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Minutes, 8 May 2025 PSWS Operations Zoom

Here's a brief wrap-up of the 8 May, 2025 PSWS Operations Zoom call. ~13 in attendance. (The

May 8

Gary Mikitin, AF8A2

May 5

HamSCI PSWS Meeting Reminder, 1 May 2025, 1400 UTC

Meeting minutes from last week's PSWS Operations Zoom telecon below - 73 de Gary, AF8A HamSCI

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HamSCI PSWS Meeting Reminder, 1 May 2025, 1400 UTC

Meeting minutes from last week's PSWS Operations Zoom telecon below - 73 de Gary, AF8A HamSCI

May 5

Rachel Boedicker

Apr 16

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

unread,

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

Apr 16

Ron KF7ZN, … John Gibbons5

Apr 15

Need help with HDD swap

No problem John, Bill the space was the problem, doing great now Have a nice day! Ron Wilcox KF7ZN RN

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Need help with HDD swap

No problem John, Bill the space was the problem, doing great now Have a nice day! Ron Wilcox KF7ZN RN

Apr 15

Rachel Boedicker

Apr 2

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

unread,

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

Apr 2

Chuck Smyder KK4HP, … Ward Silver3

Apr 2

HDD Update question & issue.

Node 0012 has been updated and the HDD sent off to Bill Engelke in the packing and with the label

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HDD Update question & issue.

Node 0012 has been updated and the HDD sent off to Bill Engelke in the packing and with the label

Apr 2

Apr 1

USB Drive copy with errors

Well, the 4th try was the charm. Every file got copied correctly if I copied them one at a time. The

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USB Drive copy with errors

Well, the 4th try was the charm. Every file got copied correctly if I copied them one at a time. The

Apr 1

Rachel Boedicker

Mar 19

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

unread,

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EDT tomorrow morning (14:00

Mar 19

Gary Mikitin, AF8A

Mar 11

Zoom Link: HamSCI Workshop Virtual Attendees

Hello Grape/PSWS Community - Here is the Zoom registration link for both days of the HamSCI Workshop,

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Zoom Link: HamSCI Workshop Virtual Attendees

Hello Grape/PSWS Community - Here is the Zoom registration link for both days of the HamSCI Workshop,

Mar 11

Rachel Boedicker

Mar 5

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EST tomorrow morning (15:00

unread,

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EST tomorrow morning (15:00

Mar 5

bblackw...@gmail.com

Feb 20

Grape2 station software version info

This note is for hams running Grape2 stations. The current software on your Grape2 system adds the

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Grape2 station software version info

This note is for hams running Grape2 stations. The current software on your Grape2 system adds the

Feb 20

Billy, John Gibbons3

Feb 15

Grape 2 image file needed.

Billy, Why do you say your G2 image is corrupted? What are the issues you are seeing to come to this

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Grape 2 image file needed.

Billy, Why do you say your G2 image is corrupted? What are the issues you are seeing to come to this

Feb 15

Rachel Boedicker3

Feb 12

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EST tomorrow morning (15:00

unread,

HamSCI PSWS Meeting Reminder

Hello everyone, We have a zoom meeting for the HamSCI PSWS Group at 10:00 EST tomorrow morning (15:00

Feb 12

Jan 23

Download of Grape DRF image

In order to reinstall the software on my Raspberry Pi Grape DRF I have had repeated errors when

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Download of Grape DRF image

In order to reinstall the software on my Raspberry Pi Grape DRF I have had repeated errors when

Jan 23

Gary Mikitin, AF8A

Jan 22

HamSCI PSWS Operations Telecon - Thurs 23 Jan 10AM Eastern

Hello All - I'm pretty sure we'll be talking 'Personal Space Wx Station' at 1500UTC

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HamSCI PSWS Operations Telecon - Thurs 23 Jan 10AM Eastern

Hello All - I'm pretty sure we'll be talking 'Personal Space Wx Station' at 1500UTC

Jan 22

Jan 18

Grape 2 Powerup Sequence

Is there some way to put some sort of delay on the Pi bootup or Grape 2 software start when powering

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Grape 2 Powerup Sequence

Is there some way to put some sort of delay on the Pi bootup or Grape 2 software start when powering

Jan 18

Gary Mikitin, AF8A

Jan 18

Grape Telecon Rebranded: HamSCI PSWS Operations Telecon

The HamSCI Grape Telecon, active for nearly five years, has a new, expanded scope: The Zoom session,

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Grape Telecon Rebranded: HamSCI PSWS Operations Telecon

The HamSCI Grape Telecon, active for nearly five years, has a new, expanded scope: The Zoom session,

Jan 18

Gary Mikitin, AF8A, Dr. Nathaniel A. Frissell Ph.D.2

Jan 16

Are we holding a Grape Zoom today (Thurs, 16 Jan)?

Hi Gary and the group, Yes, I will be there. I can give an update of plans for the new year and the

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Are we holding a Grape Zoom today (Thurs, 16 Jan)?

Hi Gary and the group, Yes, I will be there. I can give an update of plans for the new year and the

Jan 16

12/31/24

Grape DRF boot error

After a unexpected power failure the Grape DRF failed to restart. After running the usual restart

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Grape DRF boot error

After a unexpected power failure the Grape DRF failed to restart. After running the usual restart

12/31/24

Jeff Burmeister

12/30/24

Re: Your PSWS Station is Offline

Upon installation, I determined the mixer board antenna input was shorted. Is a replacement mixer

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Re: Your PSWS Station is Offline

Upon installation, I determined the mixer board antenna input was shorted. Is a replacement mixer

12/30/24

Gary Mikitin, AF8A, Normand Juneau4

12/22/24

Rather Odd-Looking Plot from 21 Dec 2024

Doh! This is embarrassing: My WSPR transmitter was overloading the Grape system (the antennas share

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Rather Odd-Looking Plot from 21 Dec 2024

Doh! This is embarrassing: My WSPR transmitter was overloading the Grape system (the antennas share

12/22/24

Al Aardsma, … bblackw...@gmail.com4

12/19/24

Fwd: [HamSCI] Grape-DRF RPi Fail

Correction… Then hit ctrl-C in the terminal window if it is running the scheduler, open a new

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Fwd: [HamSCI] Grape-DRF RPi Fail

Correction… Then hit ctrl-C in the terminal window if it is running the scheduler, open a new

12/19/24

Hetzal Hartley, Gary Mikitin, AF8A2

12/16/24

Grape DRF restart problem

Hetzal - Check out this post. It may contain a solution. https://groups.google.com/g/hamsci-grape/c/

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Grape DRF restart problem

Hetzal - Check out this post. It may contain a solution. https://groups.google.com/g/hamsci-grape/c/

12/16/24

Rachel Boedicker, Dr. Nathaniel A. Frissell Ph.D.3

12/5/24

Grape Telecon Reminder

Sorry.. I mean the 4 PM telecon THIS afternoon! 73 de Nathaniel From: Dr. Nathaniel A. Frissell Ph.D.

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Grape Telecon Reminder

Sorry.. I mean the 4 PM telecon THIS afternoon! 73 de Nathaniel From: Dr. Nathaniel A. Frissell Ph.D.

12/5/24

Hetzal Hartley, John Gibbons2

11/21/24

Grape 1 protection from strong HF signals

Disconnecting the antenna is perfect! No need to shut it down. John N8OBJ On Wed, Nov 20, 2024 at 5:

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Grape 1 protection from strong HF signals

Disconnecting the antenna is perfect! No need to shut it down. John N8OBJ On Wed, Nov 20, 2024 at 5:

11/21/24

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