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pacsat email list
by Fevig, Ronald 15 Apr '24

15 Apr '24

Hello Bill, Thank you very much for today's meeting. Please add me to the PacSat email list. 73 Ron N0UCV Ronald Fevig, Ph.D. Associate Professor Assistant Chair Department of Space Studies University of North Dakota Tel: 701-777-6790 Fax: 701-777-3711 e-mail: ronald.fevig(a)und.edu

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Re: Pacsat Progress Report - January 2024
by Mark Hammond 16 Jan '24

16 Jan '24

Hi Bill and team---this is so awesome!! Tom Clark is pleased and smiling :) Whenever you all want to visit/chat with command/ops, just let me and Drew know. Or if a working unit is available, rest assured we'll test whatever needs to be tested. Congrats---nice updates!! 73, Mark N8MH On 1/15/2024 11:44 AM, Bill Reed via pacsat wrote: > > ForwardedMessage.eml > > Subject: > [pacsat] Pacsat Progress Report - January 2024 > From: > Bill Reed <bill(a)brconnect.com> > Date: > 1/15/2024, 11:44 AM > > To: > pacsat(a)amsat.org > > > Our hardware and software progress have been very good. > > We have just received our first pass on a full cubesat sized pacsat > board. We initially > encountered some hardware issues but now have the processor > functioning and are > in the process of testing the primary cpu interfaces. > > This board includes 4 uplink receivers, 1 downlink transmitter, > transmitter power amp, RAM for message storage, and miscellaneous > watch dogs, etc. > The JTAG interface is operational. > > Our test software ( as demonstrated at the 2023 annual meeting ) is > being ported to this board. > > > ----------------------------------------------------------- > > pacsat mailing list --pacsat(a)amsat.org > View archives of this mailing list athttps://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email topacsat-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences athttps://mailman.amsat.org -- Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Pacsat Progress Report - January 2024
by Bill Reed 15 Jan '24

15 Jan '24

Our hardware and software progress have been very good. We have just received our first pass on a full cubesat sized pacsat board. We initially encountered some hardware issues but now have the processor functioning and are in the process of testing the primary cpu interfaces. This board includes 4 uplink receivers, 1 downlink transmitter, transmitter power amp, RAM for message storage, and miscellaneous watch dogs, etc. The JTAG interface is operational. Our test software ( as demonstrated at the 2023 annual meeting ) is being ported to this board.

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Pacsat development progress
by Bill Reed 03 Nov '23

03 Nov '23

The Ascent/Pacsat team was pleased to present our first public pacsat presentation at the 2023 AMSAT Symposium. Watch this mail list for periodic updates of our progress. Our documents and code are all fully open source on github.com/AMSAT-NA. Bill NX5R

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PACSAT Ground station Version 0.54a
by Chris Thompson 06 May '23

06 May '23

This post is of general interest and is going to the broader Pacsat list. I am making Version 0.45a of the Pacsat ground station available for testing. You can download it from my website here: https://www.g0kla.com/pacsat/index.php This version allows spacecraft to be added and removed. In particular it allows a test spacecraft called Pacsat to be added. This can be used to test the code we are developing for the TMS570 launchpad and the Booster Pack that Jim has developed. I will post some instructions for testing in another post. 73 Chris -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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Fwd: Falconsat-3, the end is near! TX to be turned ON 1910 UTC 19 Jan 2023
by Mark L. Hammond 19 Jan '23

19 Jan '23

FYI! Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Thu, Jan 19, 2023 at 7:00 AM Subject: Falconsat-3, the end is near! TX to be turned ON 1910 UTC 19 Jan 2023 To: Amsat - BBs <amsat-bb(a)amsat.org> Hi all, Current predictions for Falconsat-3 reentry seem to converge around late (UTC) 21 Jan 2023 to early (UTC) 22 Jan 2023. Therefore, I plan to command TX ON about 1910 UTC today, 19 Jan 2023, with battery management OFF. In recent weeks, it has survived this for 24-30 hours--at which time I have turned it OFF. So, this will be right on the margins for battery vs. reentry, but we're going to "flame out" either way :) Good luck with listening over the next couple of days.. TLEs here are current daily https://www.amsat.org/tle/current/daily.all Or you may need to get them directly from Space-Track.. Reports here deeply appreciated! https://www.amsat.org/status/ 73! Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Decay of FalconSat-3 -- Announcement of PACSAT Development
by Paul Stoetzer 10 Jan '23

10 Jan '23

Good evening, It occurred to me that the decay of FS-3 might be a good time to formally announce the work on this project as a continuation of the PACSAT legacy. Thoughts? 73, Paul, N8HM

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Fwd: Falconsat-3 ON 0118utc 7 Jan 2023 for about 24 hrs, reentry soon!
by Mark L. Hammond 06 Jan '23

06 Jan '23

FYI! Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Fri, Jan 6, 2023 at 6:56 PM Subject: Falconsat-3 ON 0118utc 7 Jan 2023 for about 24 hrs, reentry soon! To: Amsat - BBs <amsat-bb(a)amsat.org> Just tweeted: Expect Falconsat-3 to be ON beginning around 0118utc 7 Jan 2023 for about 24 hrs. Reentry is expected around 24 Jan 2023, so not much time left. Will try to leave TX on for last 2-3 days to capture as much telemetry as possible during its final orbits. 73, Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Fwd: Falconsat-3 TX ON
by Mark L. Hammond 17 Dec '22

17 Dec '22

73! Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Sat, Dec 17, 2022 at 6:38 AM Subject: Falconsat-3 TX ON To: Amsat - BBs <amsat-bb(a)amsat.org> Falconsat-3 TX ON for over 24 hours beginning 1132utc 17 Dec 2022. 73, Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Fwd: Falconsat-3 ON for 24 hrs
by Mark L. Hammond 10 Dec '22

10 Dec '22

Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Sat, Dec 10, 2022 at 12:29 PM Subject: Falconsat-3 ON for 24 hrs To: Amsat - BBs <amsat-bb(a)amsat.org> Falconsat-3-3 TX ON for about 24 Hrs starting at 1725utc 10 Dec 2022. Use it before we lose it ;-) Digipeater is always active. 73, Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Fwd: Falconsat-3 ON around 1805utc 3 Dec 2022
by Mark L. Hammond 03 Dec '22

03 Dec '22

FYI Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Sat, Dec 3, 2022 at 10:50 AM Subject: Falconsat-3 ON around 1805utc 3 Dec 2022 To: Amsat - BBs <amsat-bb(a)amsat.org> Hopefully Falconsat-3 will be turned ON around 1805utc today 3 Dec 2022 for about 24 hours. Recent projections by WA4SCA suggest it will re-enter early/mid February, so use it while we can! 73, Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Fwd: Falconsat-3 24hr ON period 11-25-22
by Mark L. Hammond 25 Nov '22

25 Nov '22

FYI! --------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Fri, Nov 25, 2022 at 2:49 PM Subject: Falconsat-3 24hr ON period 11-25-22 To: Amsat - BBs <amsat-bb(a)amsat.org> I plan to command ON Falconsat-3 around 2136utc on 25 Nov 2022, with battery management OFF, hoping for over 24 hours of operations. 73! Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Fwd: Falconsat-3 schedule this weekend 11/18-19/22
by Mark L. Hammond 18 Nov '22

18 Nov '22

FYI Mark L. Hammond [N8MH] AMSAT Director and Command Station ---------- Forwarded message --------- From: Mark L. Hammond <marklhammond(a)gmail.com> Date: Fri, Nov 18, 2022 at 4:13 PM Subject: Falconsat-3 schedule this weekend 11/18-19/22 To: Amsat - BBs <amsat-bb(a)amsat.org> Hi folks, I hope to be able to turn ON Falconsat-3 for about 24 hours tonight at either 0110utc or 0245utc on 19 Nov 2022. 73, Mark L. Hammond [N8MH] AMSAT Director and Command Station

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Basic BBS Operations
by Chris Thompson 03 Nov '22

03 Nov '22

I took an action at the last meeting to document basic BBS operations. I put some thoughts in the attached document. This is in Open Office format. For those without Open Office I attached a pdf. I will happily put this in git if someone points me to the git repository. All thoughts / comments welcome. This is mostly a brain dump of how things work "today" with some thoughts about the future. 73 Chris -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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A little QRM for the list :-)
by Zach Metzinger 03 Nov '22

03 Nov '22

Hello all, I can't tell if I'm signed up or not, so I'm sending this test message to probe. No need to ignore it -- I'm social enough, if you should want to reply. --- Zach N0ZGO

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subscribe
by Zach Metzinger 02 Nov '22

02 Nov '22

subscribe

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BBS Operations document
by Chris Thompson 02 Nov '22

02 Nov '22

I tried to send the BBS Operations document that I drafted to the list, but anything over 40kb is rejected. So I can't send it. Do we have a git repo now? Otherwise I can share a link to the document from somewhere. 73 Chris -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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GreenCube
by Jonathan Brandenburg 01 Nov '22

01 Nov '22

Did everybody else already know about this satellite or see it in ANS / on AMSAT-BB? According to the website, the digipeater is activated each weekend and the altitude provide a long pass. ============================== GreenCube in Digipeater Mode The S5Lab research team of the University "La Sapienza," Rome, Italy, the Italian Space Agency and AMSAT Italia are happy to inform the ham radio community that the GreenCube satellite will be switched in digipeater mode between 29-Oct-2022 00:01 UTC and 30-Oct-2022 23:59 UTC. Information on the setup required to access the satellite can be found on the team's web site https://www.s5lab.space/index.php/digipeater/. The S5lab team of Sapienza provides the software needed to communicate with the satellite along with a technical guide of the setup and the GUI features. The archive contains: The user manual The Graphical User Interface (GUI) The Terminal Node Controller (TNC) software The GNURadio script to receive and transmit The software kit can be downloaded from the same web page. The satellite digipeater implements a store-and-forward message service and works at 435.310 Mhz (U/L and D/L). The 3U cubesat was launched on the Vega-C maiden flight on 13-Jul-2022 in a MEO orbit. The GreenCube project is being carried out through a collaboration agreement between the Italian Space Agency and Sapienza University of Rome, with the participation of ENEA and University Federico II of Naples. As for the radio frequency communications, a strong and effective cooperation with AMSAT Italia has been established, whereby AMSAT Italia endorsed the frequency coordination request. The team can be reached via their website at the URL https://www.s5lab.space/index.php/contact-us/. ============================== -- Jonathan Brandenburg Radio Amateur Satellite Corporation 1-214-213-1066

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Re: Introduction and Falconsat-3 question
by Mark L. Hammond 30 Oct '22

30 Oct '22

Hi Bob, it's been a while since we worked together on the AMSAT/TAPR DSP-93 :) My call was KC4EBR back then. Still one of my favorite projects :) Glad to be working on a common project again! I will plan to try to run Falconsat-3 for about 24 hours each weekend, with specifics dependent upon the time of day it's overhead, work, and recreation! The orbit precesses about 30 mins every day, so the time of day for usable passes cycles. But basically a 24 hour uptime every weekend. There's a pass around 1222UTC today 29 Oct 202, and I'll turn it ON with battery management OFF, hoping for about 24 hours of operations. I'll continue this as long as I reasonably can. Reentry is estimated to be in April 2022. Telemetry suggests that one cell is very weak, continuous 24/7/365 operations are no longer possible. My best advice is to follow me on Twitter! It's easy to post when I turn it ON/OFF, so lately that's been my preferred method of sharing the information. Also, please update your keps at least once per week, maybe more often. It appears to change enough to warrant this for people using tracking/high gain directional antennas. Here is the TLE source I'm using now: http://www.amsat.org/amsat/ftp/keps/current/daily.all Hope this schedule works for the team! We have a number of users around the planet that use it, and they are happy as well to hear that operations will be scheduled. I'll copy most of this email to the AMSAT-BB soon as well. If there are other requests for a specific day, just ask! If I can support, I will... 73! Mark L. Hammond [N8MH] AMSAT Director and Command Station On Thu, Oct 27, 2022 at 8:33 PM Bob Stricklin via pacsat <pacsat(a)amsat.org> wrote: > > > > ---------- Forwarded message ---------- > From: Bob Stricklin <bstrick(a)n5brg.com> > To: "Mark L. Hammond" <marklhammond(a)gmail.com> > Cc: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Bcc: > Date: Fri, 28 Oct 2022 00:33:26 +0000 > Subject: [pacsat] Re: Introduction and Falconsat-3 question > Mark, > > Thanks for your offer to turn on Falconsat one day a week. > > If you do this I will try to copy the passes I can see and will also work > to upload a few messages. > > If you find doing this for a full day every week is too taxing for you or > for Falconsat-3 a lesser amount of on time would be fine also. Hopefully we > could learn something from the effort and > get some more action out of the satellite before it derbies. > > Thanks, > > Bob N5BRG > > > > > On Oct 25, 2022, at 10:45 AM, Mark L. Hammond <marklhammond(a)gmail.com> > wrote: > > > > Hello PACSAT Team---it was great to learn about this project from > Jonathan at the recent AMSAT Symposium. I'm delighted to hear that you're > working on a PACSAT version of something new... > > > > It was the original microsats/pacsats project and launch that got me > interested in satellite communications, so I've been doing it for a while. > Happy to give opinions or suggestions when needed--don't be afraid to ask. > > > > My question--is there one day each week where you'd like me to turn ON > > Falconsat-3 for about 24 hours of operations? I think it'll take this > 'abuse' for a while; it's predicted to reenter around April next year, so > we have a few months before it's gone.... > > > > Putting the satellite on an operation schedule will help people know > when to expect it to be on. I though you all might enjoy listening/working > it, making recordings, tests, whatever, while we still have it working. A > challenge is that the orbit precesses like 30 mins per day, so eventually > it shifts where all passes are during the sleeping hours...so there will > some weeks where it might not be turned on... > > > > So, can you all pick the day when you'd like it on? I'll do my best to > keep it going per schedule...Drew KO4MA is also on the list, and he'll help > as needed I'm sure. > > > > Both of us are interested in an outline/overview of what you all > imagine. I think I learned 1200 AFSK uplink (four frequencies/channels), > 9600 baud FSK downlink. My preferred is 2M uplink, 70cm downlink (since > it's so quiet). It'll take about 500mw to 1W on the downlink to be useable > at 9600. Even more is desirable or necessary if you want to go higher than > 9600... I think I'm one of the remaining dinosaurs that has experience and > equipment to do 38k4 on the downlink...although wideband SDRs has changed > that! > > > > 73! > > > > Mark L. Hammond [N8MH] (formerly KC4EBR) > > AMSAT Director and Command Station > > > > ----------------------------------------------- > > pacsat mailing list -- pacsat(a)amsat.org > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > > To unsubscribe send an email to pacsat-leave(a)amsat.org > > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org > > > > ---------- Forwarded message ---------- > From: Bob Stricklin via pacsat <pacsat(a)amsat.org> > To: "Mark L. Hammond" <marklhammond(a)gmail.com> > Cc: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Bcc: > Date: Fri, 28 Oct 2022 00:33:26 +0000 > Subject: [pacsat] Re: Introduction and Falconsat-3 question > ----------------------------------------------- > pacsat mailing list -- pacsat(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Github site
by Chris Thompson 30 Oct '22

30 Oct '22

Does someone have details of the github site? I have drafted a document on the "Basic BBS Operations" and want to share it. If the site is not ready then I can send it to this list. 73 Chris G0KLA / AC2CZ -- Chris E. Thompson chrisethompson(a)gmail.com g0kla(a)arrl.net

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Re: Introduction and Falconsat-3 question
by Burns Fisher (AMSAT) 30 Oct '22

30 Oct '22

That's pretty interesting that you feel we need 1 Watt or so for 9600 baud downlink, Mark. I'm not sure if anyone thought about that. We have also been talking about multiple speed uplinks. I.e. one receiver at 1200, 1 at 9600, or whatever. Personally I want a 1200 baud uplink for my *&)E^T# IC9700, which is otherwise a great radio :-) 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Tue, Oct 25, 2022 at 12:04 PM Jonathan Brandenburg via pacsat < pacsat(a)amsat.org> wrote: > > > > ---------- Forwarded message ---------- > From: Jonathan Brandenburg <jbrandenburg(a)amsat.org> > To: pacsat(a)amsat.org > Cc: > Bcc: > Date: Tue, 25 Oct 2022 11:04:28 -0500 > Subject: [pacsat] Re: Introduction and Falconsat-3 question > On 10/25/2022 10:45 AM, Mark L. Hammond wrote: > > My question--is there one day each week where you'd like me to turn ON > > Falconsat-3 for about 24 hours of operations? > > Thank you for the offer, Mark! > > This might be the kick in the pants I need to finally assemble my > satellite packet station. I'll get to work on that right away. In the > meantime, I hope others on this list are more prepared than I am. > > Jonathan > > -- > Jonathan, KF5IDY > > > > > ---------- Forwarded message ---------- > From: Jonathan Brandenburg via pacsat <pacsat(a)amsat.org> > To: pacsat(a)amsat.org > Cc: > Bcc: > Date: Tue, 25 Oct 2022 11:04:28 -0500 > Subject: [pacsat] Re: Introduction and Falconsat-3 question > ----------------------------------------------- > pacsat mailing list -- pacsat(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: Power Thoughts
by Eric Skoog 29 Oct '22

29 Oct '22

Bob - in addition to the Chapter 5 Pwr Generation material, this is an extremely good reference document for many CubeSat Development areas. Its open source, publicly published information provides excellent tutorial introductory material for many/most of our AMSAT CubeSat development areas. Consequently, I uploaded a copy to our GOLF SVN under "tech ref docs." I found the first few chapters very familiar given my 40 year System Engineering experience, and a great refresher for my aging brain! But I found the remaining chapters contain excellent tutorial information for the major engineering disciplines we must understand and apply to be successful in our ongoing/future CubeSat development efforts. ALL chapters include myriad hyperlinks to more material electronically published in the open literature. The material does "thin out" in the last few chapters as they appear to be 'works in progress.' What particularly caught my attention was mention of the University of Hawaii's *Artemis CubeSat Kit *they are offering new satellite developers. I had no luck finding any further information about that kit on their website, but there is an invite to contact the PoC, Dr. F. Zhu (shu@ hawaii.edu) for more information. Specifically mentioned is the availability of a 1U CubeSat structure, fully qualified to NASA and CalPoly requirements, whose mechanical pieces add up to $356.02 (not counting solar panels). That might be worth looking into as Tom Wu is researching commercially available 1U structures for FOX+(PacSat). Furthermore, it is stated that they also have a CAD package for that 1U structure, viz., a 3D model (in Autodesk Inventor) that is available. Perhaps that might be of interest to Tom K. and Marwan. Lastly, I would think Vincent might benefit from one of the references which documents the failures of many past deployable solar panel designs..................good stuff all. thanks, eric (K1TVV) On Fri, Oct 28, 2022 at 11:19 AM Bob Stricklin via pacsat <pacsat(a)amsat.org> wrote: > > > > ---------- Forwarded message ---------- > From: Bob Stricklin <bstrick(a)n5brg.com> > To: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Cc: > Bcc: > Date: Fri, 28 Oct 2022 15:19:09 +0000 > Subject: [pacsat] Power Thoughts > Group, > > Power requirments is something we need to be looking at carefully. > > I found this on the web: > > https://pressbooks-dev.oer.hawaii.edu/epet302/chapter/5-5-power-generation/ > > We can look at some data from other cubsats for power generation. > Reviewing Falconsat-3 telemetry would be a good idea. > > Power and thermal design will play off each other. > > With a 2.5 W power budget for a cubsat the pacsat payload could be a large > power consumer. May effect ability to get onboard. > > If Golf T had two of the TMS520 one must have been powered down until > needed? > > Designing for minimum power will yield more operating time and a longer > mission life. Falconsat-3 is demonstrating this point now. > > Bob N5BRG > > > ---------- Forwarded message ---------- > From: Bob Stricklin via pacsat <pacsat(a)amsat.org> > To: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Cc: > Bcc: > Date: Fri, 28 Oct 2022 15:19:09 +0000 > Subject: [pacsat] Power Thoughts > ----------------------------------------------- > pacsat mailing list -- pacsat(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: Power Thoughts
by Burns Fisher (AMSAT) 28 Oct '22

28 Oct '22

Golf-Tee does not power down the standby processor. It is still handling its own telemetry and also keeping its on MRAM up to date with whole orbit data, not to mention running the command receiver. But remember Golt-TEE is a 3U with fold-out panels. 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Fri, Oct 28, 2022 at 11:19 AM Bob Stricklin via pacsat <pacsat(a)amsat.org> wrote: > > > > ---------- Forwarded message ---------- > From: Bob Stricklin <bstrick(a)n5brg.com> > To: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Cc: > Bcc: > Date: Fri, 28 Oct 2022 15:19:09 +0000 > Subject: [pacsat] Power Thoughts > Group, > > Power requirments is something we need to be looking at carefully. > > I found this on the web: > > https://pressbooks-dev.oer.hawaii.edu/epet302/chapter/5-5-power-generation/ > > We can look at some data from other cubsats for power generation. > Reviewing Falconsat-3 telemetry would be a good idea. > > Power and thermal design will play off each other. > > With a 2.5 W power budget for a cubsat the pacsat payload could be a large > power consumer. May effect ability to get onboard. > > If Golf T had two of the TMS520 one must have been powered down until > needed? > > Designing for minimum power will yield more operating time and a longer > mission life. Falconsat-3 is demonstrating this point now. > > Bob N5BRG > > > ---------- Forwarded message ---------- > From: Bob Stricklin via pacsat <pacsat(a)amsat.org> > To: "pacsat(a)amsat.org" <pacsat(a)amsat.org> > Cc: > Bcc: > Date: Fri, 28 Oct 2022 15:19:09 +0000 > Subject: [pacsat] Power Thoughts > ----------------------------------------------- > pacsat mailing list -- pacsat(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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the list
by Bill 28 Oct '22

28 Oct '22

list attached

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Power Thoughts
by Bob Stricklin 28 Oct '22

28 Oct '22

Group, Power requirments is something we need to be looking at carefully. I found this on the web: https://pressbooks-dev.oer.hawaii.edu/epet302/chapter/5-5-power-generation/ We can look at some data from other cubsats for power generation. Reviewing Falconsat-3 telemetry would be a good idea. Power and thermal design will play off each other. With a 2.5 W power budget for a cubsat the pacsat payload could be a large power consumer. May effect ability to get onboard. If Golf T had two of the TMS520 one must have been powered down until needed? Designing for minimum power will yield more operating time and a longer mission life. Falconsat-3 is demonstrating this point now. Bob N5BRG

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